diff --git a/src/server/api/anime.py b/src/server/api/anime.py
index 1ae6e62..38c5c01 100644
--- a/src/server/api/anime.py
+++ b/src/server/api/anime.py
@@ -868,6 +868,25 @@ async def add_series(
                 if hasattr(series_app, "list") and hasattr(series_app.list, "keyDict"):
                     if key in series_app.list.keyDict:
                         series_app.list.keyDict[key].episodeDict = missing_episodes
+                
+                # Save missing episodes to database
+                if db is not None and missing_episodes:
+                    from src.server.database.service import EpisodeService
+                    
+                    for season, episode_numbers in missing_episodes.items():
+                        for episode_number in episode_numbers:
+                            await EpisodeService.create(
+                                db=db,
+                                series_id=db_id,
+                                season=season,
+                                episode_number=episode_number,
+                            )
+                    
+                    logger.info(
+                        "Saved %d missing episodes to database for %s",
+                        sum(len(eps) for eps in missing_episodes.values()),
+                        key
+                    )
             else:
                 # Scanner not available - this shouldn't happen in normal operation
                 logger.warning(
diff --git a/src/server/fastapi_app.py b/src/server/fastapi_app.py
index 808ce48..bc9aed5 100644
--- a/src/server/fastapi_app.py
+++ b/src/server/fastapi_app.py
@@ -145,6 +145,12 @@ async def lifespan(_application: FastAPI):
                     "Data file sync complete. Added %d series.", sync_count
                 )
                 
+                # Load series from database into SeriesApp's in-memory cache
+                from src.server.utils.dependencies import get_anime_service
+                anime_service = get_anime_service()
+                await anime_service._load_series_from_db()
+                logger.info("Series loaded from database into memory")
+                
                 # Now initialize download service (will use data from database)
                 from src.server.utils.dependencies import get_download_service
                 download_service = get_download_service()