diff --git a/README.md b/README.md
index aa25790..9e62dbd 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ An `OutboxEvent` is written in the same transaction as any observation or alert,
 - **Medication Administration** — `POST /encounters/:id/medications` records drug administrations (name, dose, route, timestamp, administered-by); `GET /encounters/:id/medications` lists with optional `since` filter; `GET /medications/:id` detail; active-encounter guard; FluentValidation on request DTOs
 - **Medication Correlation Annotations** — `MedicationCorrelationHelper` appends medication context to warning and NEWS2 alert details when a mapped drug was administered within the correlation window (default 90 min); drug-to-vital mappings in `MedicationCorrelation` config (`appsettings.json`); annotates rather than suppresses — alerts still fire; sepsis, trend, and critical sync-path alerts are never annotated; design rationale in `docs/decisions/medication-correlation-design.md`
 - **Ward Dashboard APIs** — `GET /encounters` returns paginated `WardEncounterSummary` rows (patient name/MRN, room/bed, department, status, latest NEWS2 score, live qSOFA criteria count from Redis, sepsis bundle status, open alert count); filterable by `status` and `department`; `GET /encounters/:id/qsofa/current` exposes Redis-backed qSOFA state; CORS policy `Dashboard` allows configured origins (default `http://localhost:5173`)
-- **Ward Dashboard Frontend** — Vue 3 SPA (`vigilcare-dashboard/`) with virtual ward table (NEWS2-sorted), patient detail (vitals, scores, alerts, orders, sepsis bundle), alert center (global acknowledge/resolve), vital sign trend charts, NEWS2 history chart, local replay controls, alert reasoning with optional medication context, and clinician feedback on every alert; polls API every 5–10 s; guides in `docs/dashboard-guide.md` and `docs/clinical-testing-guide.md`
+- **Ward Dashboard Frontend** — Vue 3 SPA (`vigilcare-dashboard/`) with virtual ward table (NEWS2-sorted), patient detail (vitals, scores, alerts, orders, sepsis bundle), alert center (global acknowledge/resolve), vital sign trend charts with local replay scrubbing, NEWS2 history chart, alert reasoning with optional medication context, and clinician feedback on every alert; polls API every 5–10 s; guides in `docs/dashboard-guide.md` and `docs/clinical-testing-guide.md`
 - **Clinician Feedback Mode** — six quick ratings per alert (useful, too early, too late, false positive, missing context, would act); optional notes; Feedback Summary with aggregate stats and JSON/CSV export; client-side persistence for product research
 - **Console Replay Simulator** — standalone `VigilCare.Simulator` .NET console app replays JSON scenario files against the live API with configurable speed (`--speed 0` instant, `60` = 60× faster); commands: `replay`, `replay-all`, `validate`, `dry-run`; optional `--poll` shows alerts, NEWS2, and sepsis bundle state during replay; eight sample scenarios in `VigilCare.Simulator/Scenarios/List/`; user guide in `docs/simulator-guide.md`
 - **RabbitMQ Notification Workers** — `NotificationPublisherService` reads `alert.generated` from Kafka and publishes paging jobs to `alerts.paging.queue`; `PagingWorkerService` sends the page and waits for acknowledgment; if no ack arrives before timeout it NACKs to `alerts.paging.dlq` with `x-message-ttl = 300000ms`; if the host is stopping, in-flight paging messages are NACKed with `requeue=true` so they are retried after restart and do not false-escalate; `EscalationWorkerService` pages the on-call backup and sets alert status to `escalated`; `DischargeSummaryWorkerService` reads `encounter.status.changed`, generates a discharge summary, and stores it in MinIO under `/discharge-summaries/{encounterId}/summary.pdf`
@@ -350,7 +350,7 @@ vigilcare-dashboard/                              # Phases 17–19 — Vue 3 war
 │   ├── composables/                              # useChartData, useReplayControls, usePolling, useFeedback, chartFormat
 │   ├── stores/                                   # Pinia — ward, alerts, settings, feedback (localStorage)
 │   ├── views/                                    # WardDashboard, PatientDetail, AlertCenter, FeedbackSummary
-│   └── __tests__/                                # Vitest — 38 tests (store, feedback, charts, alerts, ward)
+│   └── __tests__/                                # Vitest — 41 tests (store, feedback, replay, charts, alerts, ward)
 ├── vite.config.js
 └── README.md                                     # Dev quick start → docs/dashboard-guide.md
 
@@ -530,7 +530,7 @@ npm install
 npm run dev
 ```
 
-Open `http://localhost:5173` — **Virtual Ward** lists active patients sorted by NEWS2 score. Click a row for patient detail (vitals, alerts, charts, alert reasoning). Use **Alert Center** for hospital-wide triage. After reviewing alerts, rate them with the six feedback buttons (useful, too early, too late, false positive, missing context, would act) and export results from **Feedback Summary** (`/feedback`).
+Open `http://localhost:5173` — **Virtual Ward** lists active patients sorted by NEWS2 score. Click a row for patient detail (vitals, alerts, charts, replay scrubbing, alert reasoning). Use **Alert Center** for hospital-wide triage. After reviewing alerts, rate them with the six feedback buttons and export results from **Feedback Summary** (`/feedback`).
 
 Replay a simulator scenario in another terminal to watch charts and alerts populate in real time. Run dashboard tests with `cd vigilcare-dashboard && npm test`. See `docs/dashboard-guide.md` for technical documentation and `docs/clinical-testing-guide.md` for structured clinician evaluation sessions.
 
@@ -1436,6 +1436,6 @@ Nineteen phases from the project roadmap are implemented and verified. Integrati
 | 18 | Clinical review mode — Chart.js vital sign trends (5 charts), NEWS2 history chart, local replay controls, alert reasoning panel, medication context on alerts; `fetchNews2History` / `fetchMedications`; Vitest composable and component tests; `docs/dashboard-guide.md` | Done |
 | 19 | Clinician feedback mode — six rating buttons per alert, optional notes, Feedback Summary with aggregate stats, JSON/CSV export, localStorage persistence; `docs/clinical-testing-guide.md` for doctor/nurse evaluation sessions | Done |
 
-**Ward dashboard:** backend APIs (`GET /encounters` ward list, `GET /qsofa/current`, CORS) and frontend SPA — `EncountersListTests`, `QsofaCurrentTests`, `vigilcare-dashboard` Vitest suite (38 tests: feedback store, FeedbackButtons, FeedbackSummary, alert components, charts, ward table).
+**Ward dashboard:** backend APIs (`GET /encounters` ward list, `GET /qsofa/current`, CORS) and frontend SPA — `EncountersListTests`, `QsofaCurrentTests`, `vigilcare-dashboard` Vitest suite (41 tests: replay scrubbing, feedback store, FeedbackButtons, FeedbackSummary, alert components, charts, ward table).
 
 **Optional follow-up:** execute and document the Kafka replay demonstration for the data lake (reset `data-lake-writer` offsets, clear MinIO prefixes, restart API, confirm Parquet rebuild). See `docs/plans/phase-9-plan.md` § Replay demonstration.
diff --git a/docs/clinical-testing-guide.md b/docs/clinical-testing-guide.md
index 6c4b2e0..c73408a 100644
--- a/docs/clinical-testing-guide.md
+++ b/docs/clinical-testing-guide.md
@@ -110,7 +110,7 @@ Use the sidebar (desktop) or bottom navigation (mobile) to move between screens.
 | **Sepsis bundle** | If sepsis was suspected — four time-critical elements and compliance status |
 | **Vital sign charts** | Trends for HR, RR, systolic BP, SpO₂, temperature |
 | **NEWS2 history** | How the early warning score changed over time |
-| **Replay controls** | Local timeline bar (pause, speed, **Next Alert →**) to step through the case |
+| **Replay controls** | Local timeline bar (pause, speed, **Next Alert →**) — scrubs charts/vitals to a point in time; does not control the simulator |
 
 **What to notice:** Would you trust these charts and explanations during a real handoff? Is anything missing?
 
@@ -271,7 +271,7 @@ Use this during or after your session.
 - [ ] Vital sign charts show sensible trends
 - [ ] NEWS2 history chart updates over time
 - [ ] Sepsis bundle panel appears when sepsis alerts fire
-- [ ] **Next Alert →** scrolls to review section and selects alerts
+- [ ] **Next Alert →** selects each open alert, scrubs charts to that time, and scrolls the review section into view
 
 ### Alert Center
 - [ ] Open / Acknowledged / Resolved tabs filter correctly
@@ -330,7 +330,7 @@ No. Rate any alert in any status.
 *Useful* = good alert clinically. *Would act* = you would specifically change care because of it. An alert can be useful information but not change your plan — use the button that best matches your reasoning.
 
 **The replay bar doesn’t pause the simulator.**  
-Correct — replay controls only scrub data already loaded in the browser. The facilitator controls simulator speed separately.
+Correct — replay controls scrub observation/chart data already loaded in the browser (pause, speed, and **Next Alert →** move a local timeline). The facilitator controls simulator speed separately.
 
 **Dark mode?**  
 Toggle in the header if your eyes prefer it; all screens support dark mode.
diff --git a/docs/dashboard-guide.md b/docs/dashboard-guide.md
index 6fda3c6..bf9d473 100644
--- a/docs/dashboard-guide.md
+++ b/docs/dashboard-guide.md
@@ -197,13 +197,17 @@ Five **vital sign trend** line charts (Chart.js via `vue-chartjs`):
 
 #### Replay controls
 
-Local playback UI for reviewing scenario timelines:
+Local playback UI for reviewing scenario timelines against data already loaded for this encounter:
 
-- Pause / resume, speed presets (1×, 60×, 360×, Instant)
-- Progress bar and elapsed time display
-- **Next Alert →** cycles through open alerts chronologically, selects each for reasoning, and scrolls to the chart section
+- **Pause / resume** — starts paused at the end of the timeline (all data visible). Resume rewinds to the start and plays forward.
+- **Speed presets** (1×, 60×, 360×, Instant) — advance the replay clock through observation and NEWS2 timestamps; **Instant** jumps to the end.
+- **Progress bar and elapsed time** — derived from the earliest to latest timestamp across observations, NEWS2 history, and alerts.
+- **Chart scrubbing** — vitals panel, vital trend charts, and NEWS2 history show only data at or before the replay clock.
+- **Next Alert →** — cycles open/escalated alerts chronologically, selects each for the reasoning panel, scrubs the replay clock to that alert’s `triggeredAt`, scrolls the alert row into view, and scrolls to the chart section.
 
-> Replay state is **client-side only**. It does not send commands to the simulator.
+Selecting an alert row in **Active Alerts** also scrubs the replay clock to that alert’s time.
+
+> Replay state is **client-side only**. It does not send commands to the simulator. Patient detail loads encounter-scoped alerts on every poll so the alert list and **Next Alert →** are not affected by a prior visit to Alert Center.
 
 Patient detail data polls every **5 seconds**.
 
@@ -232,7 +236,7 @@ Typical demo flow:
 2. Replay a scenario at moderate speed (`--speed 60`).
 3. Open **Virtual Ward** — new or updated encounters appear as the simulator creates them.
 4. Click the patient — watch vitals and charts fill in as observations ingest.
-5. When alerts fire, click an alert row to read reasoning; try **Next Alert →** on the replay bar.
+5. When alerts fire, click an alert row to read reasoning (replay scrubs to that time); try **Next Alert →** on the replay bar.
 6. Use **Alert Center** to acknowledge alerts globally.
 
 **Suggested scenarios:**
@@ -305,6 +309,8 @@ Implementation plans: `docs/plans/phase-17-plan.md` (ward shell + detail), `docs
 | Blank ward / network errors in console | API not running or wrong URL | Start API; check `VITE_API_URL` |
 | CORS error in browser | Dashboard origin not allowed | Add origin to API `DashboardOptions` in `appsettings.json` |
 | Charts crash on mount | Chart data not unwrapped | Ensure `VitalTrendChart` wrapper is used (see `TrendsGrid.vue`) |
+| Replay bar stuck at 0:00 | No timestamped data yet | Wait for observations/alerts to load; bounds sync after first fetch |
+| Next Alert shows wrong patient | Stale global alert store | Fixed in Patient Detail — encounter alerts reload on mount/poll |
 | No patients listed | No active encounters | Run simulator or use seeded API data |
 | NEWS2 chart empty | Scores not computed yet | Wait for Kafka `news2-scoring` consumer after observations ingest |
 | Acknowledge fails 400 | Invalid clinician ID | Set `clinicianId` in localStorage or settings store |
diff --git a/vigilcare-dashboard/README.md b/vigilcare-dashboard/README.md
index a38eec6..d6cf7d9 100644
--- a/vigilcare-dashboard/README.md
+++ b/vigilcare-dashboard/README.md
@@ -29,7 +29,7 @@ VITE_API_URL=http://localhost:5270
 | `npm run dev` | Vite dev server (port 5173) |
 | `npm run build` | Production build |
 | `npm run preview` | Preview production build |
-| `npm test` | Vitest — 38 tests across 10 files |
+| `npm test` | Vitest — 41 tests across 10 files |
 
 ## Routes
 
@@ -48,7 +48,7 @@ VITE_API_URL=http://localhost:5270
 | Patient Detail | Vitals, scores, alerts, orders, sepsis bundle; 5 vital charts + NEWS2 history |
 | Alert Center | Global alert inbox; acknowledge / resolve; six feedback ratings per alert |
 | Alert Reasoning | Plain-language “why it fired” + optional medication context (90 min window) |
-| Replay Controls | Local pause/resume/speed scrub through fetched data (not live simulator control) |
+| Replay Controls | Local pause/resume/speed scrub; charts/vitals filter by replay clock; **Next Alert →** jumps to each open alert |
 | Clinician Feedback | Six ratings + optional notes on every alert; persisted in `localStorage` |
 | Feedback Summary | Aggregate stats by alert type; export JSON/CSV for study analysis |
 
@@ -92,7 +92,7 @@ npm test
 | `AlertCard.test.js` | Severity display, acknowledge/resolve, feedback integration |
 | `AlertReasoning.test.js` | Reasoning text for sepsis, qSOFA, unknown types |
 | `useChartData.test.js` | Chart data transformation |
-| `useReplayControls.test.js` | Pause, speed, progress, jump |
+| `useReplayControls.test.js` | Scenario bounds, progress, jumpToOffset/Timestamp, isAtOrBefore, instant speed |
 | `usePolling.test.js` | Polling interval composable |
 | `WardTable.test.js` | Ward table rendering |
 | `Badge.test.js` | Severity badge variants |
diff --git a/vigilcare-dashboard/src/__tests__/useReplayControls.test.js b/vigilcare-dashboard/src/__tests__/useReplayControls.test.js
index 033a403..1cc02c6 100644
--- a/vigilcare-dashboard/src/__tests__/useReplayControls.test.js
+++ b/vigilcare-dashboard/src/__tests__/useReplayControls.test.js
@@ -1,14 +1,21 @@
-import { describe, it, expect } from 'vitest'
+import { describe, it, expect, vi, afterEach } from 'vitest'
 import { useReplayControls } from '@/composables/useReplayControls'
 
 describe('useReplayControls', () => {
+  afterEach(() => {
+    vi.useRealTimers()
+  })
+
   it('pauseAndResume', () => {
-    const { isPaused, pause, resume } = useReplayControls()
-    expect(isPaused.value).toBe(false)
-    pause()
-    expect(isPaused.value).toBe(true)
-    resume()
-    expect(isPaused.value).toBe(false)
+    const replay = useReplayControls()
+    replay.setScenarioBounds(0, 60_000)
+    replay.syncToEnd()
+
+    expect(replay.isPaused.value).toBe(true)
+    replay.resume()
+    expect(replay.isPaused.value).toBe(false)
+    replay.pause()
+    expect(replay.isPaused.value).toBe(true)
   })
 
   it('speedPresets', () => {
@@ -19,15 +26,42 @@ describe('useReplayControls', () => {
   })
 
   it('progressComputation', () => {
-    const { currentOffsetMinutes, scenarioDurationMinutes, progress } = useReplayControls()
-    scenarioDurationMinutes.value = 100
-    currentOffsetMinutes.value = 50
-    expect(progress.value).toBe(50)
+    const replay = useReplayControls()
+    replay.setScenarioBounds(0, 100 * 60_000)
+    replay.jumpToOffset(50)
+    expect(replay.progress.value).toBe(50)
   })
 
   it('jumpToOffset', () => {
-    const { currentOffsetMinutes, jumpToOffset } = useReplayControls()
-    jumpToOffset(42)
-    expect(currentOffsetMinutes.value).toBe(42)
+    const replay = useReplayControls()
+    replay.setScenarioBounds(0, 100 * 60_000)
+    replay.jumpToOffset(42)
+    expect(replay.currentOffsetMinutes.value).toBe(42)
+  })
+
+  it('jumpToTimestamp_clampsWithinScenario', () => {
+    const replay = useReplayControls()
+    const start = new Date('2026-06-19T12:00:00Z').getTime()
+    const end = new Date('2026-06-19T14:00:00Z').getTime()
+    replay.setScenarioBounds(start, end)
+    replay.jumpToTimestamp('2026-06-19T13:00:00Z')
+    expect(replay.currentOffsetMinutes.value).toBe(60)
+  })
+
+  it('isAtOrBefore_filtersByCurrentTime', () => {
+    const replay = useReplayControls()
+    replay.setScenarioBounds(0, 120 * 60_000)
+    replay.jumpToOffset(30)
+    expect(replay.isAtOrBefore(new Date(20 * 60_000).toISOString())).toBe(true)
+    expect(replay.isAtOrBefore(new Date(40 * 60_000).toISOString())).toBe(false)
+  })
+
+  it('instantSpeedJumpsToEnd', () => {
+    const replay = useReplayControls()
+    replay.setScenarioBounds(0, 60_000)
+    replay.jumpToOffset(10)
+    replay.setSpeed(0)
+    expect(replay.progress.value).toBe(100)
+    expect(replay.isPaused.value).toBe(true)
   })
 })
diff --git a/vigilcare-dashboard/src/components/patient/AlertsList.vue b/vigilcare-dashboard/src/components/patient/AlertsList.vue
index c6d0432..a83e615 100644
--- a/vigilcare-dashboard/src/components/patient/AlertsList.vue
+++ b/vigilcare-dashboard/src/components/patient/AlertsList.vue
@@ -1,5 +1,6 @@
 <script setup>
 import { storeToRefs } from 'pinia'
+import { computed } from 'vue'
 import { useAlertStore } from '@/stores/alerts'
 import { useSettingsStore } from '@/stores/settings'
 import { usePolling } from '@/composables/usePolling'
@@ -20,11 +21,15 @@ const alertStore = useAlertStore()
 const settings = useSettingsStore()
 const { alerts, loading } = storeToRefs(alertStore)
 
-function loadOpenAlerts() {
-  return alertStore.loadAlerts(props.encounterId, 'OPEN')
+function loadEncounterAlerts() {
+  return alertStore.loadAlerts(props.encounterId)
 }
 
-usePolling(loadOpenAlerts, 5_000)
+usePolling(loadEncounterAlerts, 5_000)
+
+const visibleAlerts = computed(() =>
+  alerts.value.filter(a => a.status !== 'Resolved'),
+)
 
 function severityVariant(severity) {
   return severity === 'Critical' ? 'critical' : 'warning'
@@ -32,12 +37,12 @@ function severityVariant(severity) {
 
 async function acknowledge(alertId) {
   await alertStore.acknowledge(alertId, settings.clinicianId)
-  await loadOpenAlerts()
+  await loadEncounterAlerts()
 }
 
 async function resolve(alertId) {
   await alertStore.resolve(alertId)
-  await loadOpenAlerts()
+  await loadEncounterAlerts()
 }
 </script>
 
@@ -49,10 +54,11 @@ async function resolve(alertId) {
       </h2>
     </template>
 
-    <EmptyState v-if="!loading && alerts.length === 0" message="No open alerts" />
+    <EmptyState v-if="!loading && visibleAlerts.length === 0" message="No open alerts" />
     <ul v-else class="divide-y divide-gray-200 dark:divide-gray-700">
       <li
-        v-for="alert in alerts"
+        v-for="alert in visibleAlerts"
+        :id="`alert-row-${alert.id}`"
         :key="alert.id"
         class="flex cursor-pointer flex-col gap-4 py-4 first:pt-0 last:pb-0 sm:flex-row sm:items-start sm:justify-between"
         :class="selectedId === alert.id ? 'bg-blue-50/50 dark:bg-blue-950/20' : ''"
diff --git a/vigilcare-dashboard/src/components/replay/ReplayControls.vue b/vigilcare-dashboard/src/components/replay/ReplayControls.vue
index a6cc047..aefa654 100644
--- a/vigilcare-dashboard/src/components/replay/ReplayControls.vue
+++ b/vigilcare-dashboard/src/components/replay/ReplayControls.vue
@@ -1,11 +1,15 @@
 <script setup>
-import { useReplayControls } from '@/composables/useReplayControls'
 import Button from '@/components/ui/Button.vue'
 
-const { isPaused, speed, progress, formattedTime, pause, resume, setSpeed } = useReplayControls()
+defineProps({
+  alerts: { type: Array, default: () => [] },
+  isPaused: { type: Boolean, required: true },
+  progress: { type: Number, required: true },
+  formattedTime: { type: String, required: true },
+  speed: { type: Number, required: true },
+})
 
-defineProps({ alerts: { type: Array, default: () => [] } })
-const emit = defineEmits(['jump-to-alert'])
+const emit = defineEmits(['jump-to-alert', 'pause', 'resume', 'set-speed'])
 
 const speedPresets = [
   { label: '1×', value: 1 },
@@ -17,15 +21,17 @@ const speedPresets = [
 
 <template>
   <div class="flex w-full min-w-0 flex-col gap-4 rounded-lg border border-gray-200 bg-white p-4 dark:border-gray-700 dark:bg-gray-900 sm:flex-row sm:items-center">
-    <Button variant="ghost" size="sm" @click="isPaused ? resume() : pause()">
+    <Button variant="ghost" size="sm" @click="isPaused ? emit('resume') : emit('pause')">
       <span class="sr-only">{{ isPaused ? 'Resume' : 'Pause' }}</span>
       {{ isPaused ? '▶' : '⏸' }}
     </Button>
 
     <div class="min-w-0 flex-1">
       <div class="h-2 overflow-hidden rounded-full bg-gray-200 dark:bg-gray-700">
-        <div class="h-full rounded-full bg-blue-500 transition-all duration-300"
-             :style="{ width: `${progress}%` }" />
+        <div
+          class="h-full rounded-full bg-blue-500 transition-all duration-300"
+          :style="{ width: `${progress}%` }"
+        />
       </div>
     </div>
 
@@ -41,16 +47,16 @@ const speedPresets = [
         :class="speed === preset.value
           ? 'bg-blue-500 text-white'
           : 'bg-gray-100 text-gray-600 hover:bg-gray-200 dark:bg-gray-800 dark:text-gray-400'"
-        @click="setSpeed(preset.value)"
+        @click="emit('set-speed', preset.value)"
       >
         {{ preset.label }}
       </button>
     </div>
 
     <div v-if="alerts.length" class="border-t border-gray-200 pt-4 sm:border-t-0 sm:border-l sm:pl-4 sm:pt-0 dark:border-gray-700">
-      <Button variant="ghost" size="sm" @click="$emit('jump-to-alert')">
+      <Button variant="ghost" size="sm" @click="emit('jump-to-alert')">
         Next Alert &rarr;
       </Button>
     </div>
   </div>
-</template>
\ No newline at end of file
+</template>
diff --git a/vigilcare-dashboard/src/composables/useReplayControls.js b/vigilcare-dashboard/src/composables/useReplayControls.js
index 9e58edc..0e38e51 100644
--- a/vigilcare-dashboard/src/composables/useReplayControls.js
+++ b/vigilcare-dashboard/src/composables/useReplayControls.js
@@ -1,30 +1,137 @@
 import { ref, computed } from 'vue'
 
-export function useReplayControls() {
-  const isPaused = ref(false)
-  const speed = ref(60)
-  const currentOffsetMinutes = ref(0)
-  const scenarioDurationMinutes = ref(0)
+const TICK_MS = 100
 
-  const progress = computed(() =>
-    scenarioDurationMinutes.value > 0
-      ? (currentOffsetMinutes.value / scenarioDurationMinutes.value) * 100
-      : 0
-  )
+export function useReplayControls() {
+  const isPaused = ref(true)
+  const speed = ref(60)
+  const scenarioStartMs = ref(0)
+  const scenarioEndMs = ref(0)
+  const currentMs = ref(0)
+  let timer = null
+
+  const scenarioDurationMinutes = computed(() => {
+    const span = scenarioEndMs.value - scenarioStartMs.value
+    return span > 0 ? span / 60_000 : 0
+  })
+
+  const currentOffsetMinutes = computed(() => {
+    const span = currentMs.value - scenarioStartMs.value
+    return span > 0 ? span / 60_000 : 0
+  })
+
+  const progress = computed(() => {
+    const span = scenarioEndMs.value - scenarioStartMs.value
+    if (span <= 0) return 0
+    return Math.min(100, ((currentMs.value - scenarioStartMs.value) / span) * 100)
+  })
 
   const formattedTime = computed(() => {
-    const h = Math.floor(currentOffsetMinutes.value / 60)
-    const m = Math.floor(currentOffsetMinutes.value % 60)
+    const mins = currentOffsetMinutes.value
+    const h = Math.floor(mins / 60)
+    const m = Math.floor(mins % 60)
     return `${h}:${String(m).padStart(2, '0')}`
   })
 
-  function pause() { isPaused.value = true }
-  function resume() { isPaused.value = false }
-  function setSpeed(s) { speed.value = s }
-
-  function jumpToOffset(offset) {
-    currentOffsetMinutes.value = offset
+  function setScenarioBounds(startMs, endMs) {
+    if (!Number.isFinite(startMs) || !Number.isFinite(endMs) || endMs <= startMs) return
+    scenarioStartMs.value = startMs
+    scenarioEndMs.value = endMs
+    if (currentMs.value < startMs || currentMs.value > endMs) {
+      currentMs.value = endMs
+    }
   }
 
-  return { isPaused, speed, currentOffsetMinutes, scenarioDurationMinutes, progress, formattedTime, pause, resume, setSpeed, jumpToOffset }
-}
\ No newline at end of file
+  function syncToEnd() {
+    if (scenarioEndMs.value > scenarioStartMs.value) {
+      currentMs.value = scenarioEndMs.value
+    }
+  }
+
+  function pause() {
+    isPaused.value = true
+    stopTick()
+  }
+
+  function resume() {
+    if (scenarioEndMs.value <= scenarioStartMs.value) return
+    if (currentMs.value >= scenarioEndMs.value) {
+      currentMs.value = scenarioStartMs.value
+    }
+    isPaused.value = false
+    startTick()
+  }
+
+  function setSpeed(s) {
+    speed.value = s
+    if (s === 0) {
+      currentMs.value = scenarioEndMs.value
+      pause()
+    }
+  }
+
+  function jumpToOffset(minutes) {
+    if (scenarioEndMs.value <= scenarioStartMs.value) return
+    const target = scenarioStartMs.value + minutes * 60_000
+    currentMs.value = Math.min(Math.max(target, scenarioStartMs.value), scenarioEndMs.value)
+  }
+
+  function jumpToTimestamp(iso) {
+    if (!iso || scenarioEndMs.value <= scenarioStartMs.value) return
+    const ms = new Date(iso).getTime()
+    currentMs.value = Math.min(Math.max(ms, scenarioStartMs.value), scenarioEndMs.value)
+  }
+
+  function isAtOrBefore(iso) {
+    if (!iso) return true
+    return new Date(iso).getTime() <= currentMs.value
+  }
+
+  function tick() {
+    if (isPaused.value || scenarioEndMs.value <= scenarioStartMs.value) return
+
+    if (speed.value === 0) {
+      currentMs.value = scenarioEndMs.value
+      pause()
+      return
+    }
+
+    currentMs.value = Math.min(currentMs.value + TICK_MS * speed.value, scenarioEndMs.value)
+    if (currentMs.value >= scenarioEndMs.value) pause()
+  }
+
+  function startTick() {
+    stopTick()
+    timer = setInterval(tick, TICK_MS)
+  }
+
+  function stopTick() {
+    if (timer) clearInterval(timer)
+    timer = null
+  }
+
+  function stopPlayback() {
+    stopTick()
+  }
+
+  return {
+    isPaused,
+    speed,
+    scenarioStartMs,
+    scenarioEndMs,
+    currentMs,
+    scenarioDurationMinutes,
+    currentOffsetMinutes,
+    progress,
+    formattedTime,
+    setScenarioBounds,
+    syncToEnd,
+    pause,
+    resume,
+    setSpeed,
+    jumpToOffset,
+    jumpToTimestamp,
+    isAtOrBefore,
+    stopPlayback,
+  }
+}
diff --git a/vigilcare-dashboard/src/views/PatientDetail.vue b/vigilcare-dashboard/src/views/PatientDetail.vue
index 7a44027..a2d43cf 100644
--- a/vigilcare-dashboard/src/views/PatientDetail.vue
+++ b/vigilcare-dashboard/src/views/PatientDetail.vue
@@ -1,8 +1,9 @@
 <script setup>
-import { ref, watch, computed } from 'vue'
+import { ref, watch, computed, onBeforeUnmount } from 'vue'
 import { useRoute } from 'vue-router'
 import { storeToRefs } from 'pinia'
 import { usePolling } from '@/composables/usePolling'
+import { useReplayControls } from '@/composables/useReplayControls'
 import { useAlertStore } from '@/stores/alerts'
 import * as encountersApi from '@/api/encounters'
 import * as clinicalApi from '@/api/clinical'
@@ -20,6 +21,7 @@ import Skeleton from '@/components/ui/Skeleton.vue'
 const route = useRoute()
 const alertStore = useAlertStore()
 const { alerts } = storeToRefs(alertStore)
+const replay = useReplayControls()
 
 const encounter = ref(null)
 const loading = ref(true)
@@ -36,6 +38,33 @@ const openAlerts = computed(() =>
   alerts.value.filter(a => a.status === 'Open' || a.status === 'Escalated'),
 )
 
+const replayObservations = computed(() =>
+  observations.value.filter(o => replay.isAtOrBefore(o.recordedAt)),
+)
+
+const replayNews2History = computed(() =>
+  news2History.value.filter(h => replay.isAtOrBefore(h.calculatedAt)),
+)
+
+function collectScenarioTimes() {
+  return [
+    ...observations.value.map(o => new Date(o.recordedAt).getTime()),
+    ...news2History.value.map(h => new Date(h.calculatedAt).getTime()),
+    ...alerts.value.map(a => new Date(a.triggeredAt).getTime()),
+  ].filter(Number.isFinite)
+}
+
+function syncReplayBounds() {
+  const times = collectScenarioTimes()
+  if (!times.length) return
+
+  const atEnd = replay.currentMs.value >= replay.scenarioEndMs.value - 1_000
+  replay.setScenarioBounds(Math.min(...times), Math.max(...times))
+  if (atEnd || replay.scenarioEndMs.value === replay.scenarioStartMs.value) {
+    replay.syncToEnd()
+  }
+}
+
 async function loadAll() {
   const id = route.params.encounterId
   loading.value = true
@@ -49,6 +78,7 @@ async function loadAll() {
       clinicalApi.fetchSepsisBundle(id).catch(() => null),
       clinicalApi.fetchOrders(id).catch(() => ({ items: [] })),
     ])
+    await alertStore.loadAlerts(id)
     encounter.value = enc
     observations.value = obs
     news2.value = n2
@@ -56,6 +86,7 @@ async function loadAll() {
     medications.value = meds
     sepsisBundle.value = bundle
     orders.value = ord.items ?? ord
+    syncReplayBounds()
   } finally {
     loading.value = false
   }
@@ -63,6 +94,7 @@ async function loadAll() {
 
 function onSelectAlert(alert) {
   selectedAlert.value = alert
+  replay.jumpToTimestamp(alert.triggeredAt)
 }
 
 function jumpToNextAlert() {
@@ -70,8 +102,13 @@ function jumpToNextAlert() {
     (a, b) => new Date(a.triggeredAt) - new Date(b.triggeredAt),
   )
   if (!sorted.length) return
-  selectedAlert.value = sorted[nextAlertIndex % sorted.length]
+
+  const alert = sorted[nextAlertIndex % sorted.length]
+  selectedAlert.value = alert
   nextAlertIndex++
+  replay.jumpToTimestamp(alert.triggeredAt)
+
+  document.getElementById(`alert-row-${alert.id}`)?.scrollIntoView({ behavior: 'smooth', block: 'nearest' })
   document.getElementById('clinical-review')?.scrollIntoView({ behavior: 'smooth', block: 'start' })
 }
 
@@ -80,8 +117,20 @@ usePolling(loadAll, 5_000)
 watch(() => route.params.encounterId, () => {
   selectedAlert.value = null
   nextAlertIndex = 0
+  replay.pause()
   loadAll()
 })
+
+watch(openAlerts, (list) => {
+  nextAlertIndex = 0
+  if (selectedAlert.value && !list.some(a => a.id === selectedAlert.value.id)) {
+    selectedAlert.value = null
+  }
+})
+
+watch([observations, news2History, alerts], syncReplayBounds, { deep: true })
+
+onBeforeUnmount(() => replay.stopPlayback())
 </script>
 
 <template>
@@ -98,7 +147,7 @@ watch(() => route.params.encounterId, () => {
 
     <div class="grid min-w-0 gap-4 sm:grid-cols-2 lg:grid-cols-3">
       <ScoresPanel :news2="news2" :encounter="encounter" />
-      <VitalsPanel :observations="observations" />
+      <VitalsPanel :observations="replayObservations" />
       <AlertsList
         :encounter-id="route.params.encounterId"
         :selected-id="selectedAlert?.id"
@@ -118,9 +167,19 @@ watch(() => route.params.encounterId, () => {
     </div>
 
     <div id="clinical-review" class="w-full min-w-0 space-y-8">
-      <TrendsGrid :observations="observations" />
-      <News2History v-if="news2History.length" :history="news2History" />
-      <ReplayControls :alerts="openAlerts" @jump-to-alert="jumpToNextAlert" />
+      <TrendsGrid :observations="replayObservations" />
+      <News2History v-if="replayNews2History.length" :history="replayNews2History" />
+      <ReplayControls
+        :alerts="openAlerts"
+        :is-paused="replay.isPaused"
+        :progress="replay.progress"
+        :formatted-time="replay.formattedTime"
+        :speed="replay.speed"
+        @pause="replay.pause()"
+        @resume="replay.resume()"
+        @set-speed="replay.setSpeed"
+        @jump-to-alert="jumpToNextAlert"
+      />
     </div>
   </div>
 </template>