diff --git a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/TmdbEntityBrowseScreen.kt b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/TmdbEntityBrowseScreen.kt
index 1f4ceef7..91538d6e 100644
--- a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/TmdbEntityBrowseScreen.kt
+++ b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/TmdbEntityBrowseScreen.kt
@@ -90,6 +90,7 @@ fun TmdbEntityBrowseScreen(
         WatchedRepository.ensureLoaded()
         WatchedRepository.uiState
     }.collectAsStateWithLifecycle()
+    val fullyWatchedSeriesKeys by WatchedRepository.fullyWatchedSeriesKeys.collectAsStateWithLifecycle()
     val loadFailedMessage = stringResource(Res.string.details_browse_load_failed, entityName)
 
     LaunchedEffect(entityKind, entityId) {
@@ -122,6 +123,7 @@ fun TmdbEntityBrowseScreen(
                     data = state.data,
                     sourceType = sourceType,
                     watchedKeys = watchedUiState.watchedKeys,
+                    fullyWatchedSeriesKeys = fullyWatchedSeriesKeys,
                     onOpenMeta = onOpenMeta,
                 )
             }
@@ -150,6 +152,7 @@ private fun EntityBrowseContent(
     data: TmdbEntityBrowseData,
     sourceType: String,
     watchedKeys: Set<String>,
+    fullyWatchedSeriesKeys: Set<String>,
     onOpenMeta: (MetaPreview) -> Unit,
 ) {
     val backgroundUrl = remember(data.rails, sourceType) {
@@ -192,6 +195,7 @@ private fun EntityBrowseContent(
                 WideEntityBrowseContent(
                     data = data,
                     watchedKeys = watchedKeys,
+                    fullyWatchedSeriesKeys = fullyWatchedSeriesKeys,
                     onOpenMeta = onOpenMeta,
                 )
             } else if (data.rails.isEmpty()) {
@@ -225,6 +229,7 @@ private fun EntityBrowseContent(
                             title = entityRailTitle(rail),
                             items = rail.items,
                             watchedKeys = watchedKeys,
+                            fullyWatchedSeriesKeys = fullyWatchedSeriesKeys,
                             headerHorizontalPadding = 20.dp,
                             onPosterClick = onOpenMeta,
                         )
@@ -242,6 +247,7 @@ private fun EntityBrowseContent(
 private fun WideEntityBrowseContent(
     data: TmdbEntityBrowseData,
     watchedKeys: Set<String>,
+    fullyWatchedSeriesKeys: Set<String>,
     onOpenMeta: (MetaPreview) -> Unit,
 ) {
     Row(
@@ -292,6 +298,7 @@ private fun WideEntityBrowseContent(
                         title = entityRailTitle(rail),
                         items = rail.items,
                         watchedKeys = watchedKeys,
+                        fullyWatchedSeriesKeys = fullyWatchedSeriesKeys,
                         headerHorizontalPadding = 0.dp,
                         onPosterClick = onOpenMeta,
                     )
diff --git a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/components/DetailPosterRailSection.kt b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/components/DetailPosterRailSection.kt
index ba229f7d..b5b570e4 100644
--- a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/components/DetailPosterRailSection.kt
+++ b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/details/components/DetailPosterRailSection.kt
@@ -25,6 +25,7 @@ fun DetailPosterRailSection(
     items: List<MetaPreview>,
     watchedKeys: Set<String>,
     modifier: Modifier = Modifier,
+    fullyWatchedSeriesKeys: Set<String> = emptySet(),
     showHeader: Boolean = true,
     headerHorizontalPadding: Dp = 0.dp,
     horizontalScrollPadding: Dp = 0.dp,
@@ -50,6 +51,7 @@ fun DetailPosterRailSection(
                 isWatched = WatchingState.isPosterWatched(
                     watchedKeys = watchedKeys,
                     item = item,
+                    fullyWatchedSeriesKeys = fullyWatchedSeriesKeys,
                 ),
                 onClick = onPosterClick?.let { { it(item) } },
                 onLongClick = onPosterLongClick?.let { { it(item) } },
diff --git a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklApplicationAdapters.kt b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklApplicationAdapters.kt
index 5610f69c..a71689d6 100644
--- a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklApplicationAdapters.kt
+++ b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklApplicationAdapters.kt
@@ -63,14 +63,15 @@ object SimklWatchedSyncAdapter : TrackingWatchedProvider {
             intent = TrackingRefreshIntent.AUTOMATIC,
             origin = SimklRefreshOrigin.WATCHED_ITEMS,
         )
-        return SimklSyncRepository.state.value.snapshot.animeAlternateWatchedKeys()
+        val snapshot = SimklSyncRepository.state.value.snapshot
+        return snapshot.animeAlternateWatchedKeys() + snapshot.movieAlternateWatchedKeys()
     }
 
     override fun observeExtraWatchedKeys(profileId: Int): kotlinx.coroutines.flow.Flow<Set<String>> =
         SimklSyncRepository.state
             .map { state ->
                 SimklAnimeWatchedFallback.clearOptimisticRemovals()
-                state.snapshot.animeAlternateWatchedKeys()
+                state.snapshot.animeAlternateWatchedKeys() + state.snapshot.movieAlternateWatchedKeys()
             }
             .distinctUntilChanged()
 
diff --git a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklProjections.kt b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklProjections.kt
index 31ba673e..fccf66d1 100644
--- a/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklProjections.kt
+++ b/composeApp/src/commonMain/kotlin/com/nuvio/app/features/simkl/SimklProjections.kt
@@ -142,6 +142,26 @@ internal fun SimklSyncSnapshot.animeAlternateWatchedKeys(): Set<String> {
     return extraKeys
 }
 
+/**
+ * Builds watched keys under alternate content IDs for completed/watched movies.
+ * This allows entity browsers showing movies under tmdb: IDs to display watched badges
+ * even though the primary watched key uses an IMDB ID.
+ */
+internal fun SimklSyncSnapshot.movieAlternateWatchedKeys(): Set<String> {
+    val extraKeys = linkedSetOf<String>()
+    entries.forEach { entry ->
+        if (entry.mediaType != SimklMediaType.MOVIES) return@forEach
+        if (entry.lastWatchedAt == null && entry.status != SimklListStatus.COMPLETED) return@forEach
+        val media = entry.media ?: return@forEach
+        val contentId = media.canonicalContentId() ?: return@forEach
+        val alternateIds = media.alternateContentIds() - contentId
+        alternateIds.forEach { altId ->
+            extraKeys += watchedItemKey("movie", altId)
+        }
+    }
+    return extraKeys
+}
+
 internal fun SimklSyncSnapshot.toSimklProgressEntries(): List<WatchProgressEntry> =
     playback
         .mapNotNull(SimklPlaybackSession::toWatchProgressEntry)