diff --git a/app/models/episode.py b/app/models/episode.py
index 0c53098a..d7739ff0 100755
--- a/app/models/episode.py
+++ b/app/models/episode.py
@@ -461,6 +461,24 @@ def get_source_file(self, style: Style) -> Path:
         ).resolve()
 
 
+    def get_mask_file(self) -> Path:
+        """
+        Get the mask image associated with this Episode.
+
+        Returns:
+            Path to the mask file for this Episode.
+        """
+
+        source_name = (
+            self.source_file
+            or f's{self.season_number}e{self.episode_number}-mask.png'
+        )
+
+        return get_preferences().source_directory \
+            / self.series.path_safe_name \
+            / source_name
+
+
     @property
     def watched_statuses_flat(self) -> dict[str, bool]:
         """
@@ -525,14 +543,14 @@ def add_watched_status(self,
             current = self.watched_statuses.get(key)
             self.watched_statuses[key] = status.status
             if current != status.status:
-                log.trace(f'{self} Updating watched status '
+                log.trace(f'{self} updating watched status '
                           f'({current} -> {status.status})')
 
             return current != status.status
 
         # Interface has no mappings, add
         self.watched_statuses[key] = status.status
-        log.trace(f'{self} Adding watched status')
+        log.trace(f'{self} adding watched status')
         return True
 
 
diff --git a/app/routers/sources.py b/app/routers/sources.py
index e359188a..60daf114 100755
--- a/app/routers/sources.py
+++ b/app/routers/sources.py
@@ -765,3 +765,69 @@ def delete_series_backdrop(
 
     file.unlink(missing_ok=True)
     request.state.log.debug(f'Deleted file ({file.resolve()})')
+
+
+@source_router.put('/episode/{episode_id}/mask')
+async def upload_episode_mask_image(
+        request: Request,
+        episode_id: int,
+        file: UploadFile,
+        db: Session = Depends(get_database),
+    ) -> None:
+    """
+    
+    """
+
+    # Get contextual logger
+    log: Logger = request.state.log
+
+    # Get Episode with this ID, raise 404 if DNE
+    episode = get_episode(db, episode_id, raise_exc=True)
+
+    # Send error if no image content was provided
+    if not (uploaded_file := await file.read()):
+        raise HTTPException(
+            status_code=422,
+            detail='URL or file are required',
+        )
+
+    # If file already exists, warn about overwriting
+    if (mask_file := episode.get_mask_file()).exists():
+        log.info(f'{episode} mask image "{mask_file}" exists - replacing')
+
+    # Write content directly
+    mask_file.write_bytes(uploaded_file)
+    log.debug(f'Wrote {len(uploaded_file)} bytes to {mask_file}')
+
+    # Delete associated Card and Loaded entry to initiate future reload
+    delete_cards(
+        db,
+        db.query(CardModel).filter_by(episode_id=episode_id),
+        db.query(LoadedModel).filter_by(episode_id=episode_id),
+        log=log,
+    )
+
+
+@source_router.delete('/episode/{episode_id}/mask')
+def delete_episode_mask_image(
+        request: Request,
+        episode_id: int,
+        db: Session = Depends(get_database),
+    ) -> None:
+    """
+    Delete the mask image for the given Episode.
+
+    - episode_id: ID of the Episode whose mask file to delete.
+    """
+
+    # Get Episode with this ID, raise 404 if DNE
+    episode = get_episode(db, episode_id, raise_exc=True)
+
+    if not (mask_file := episode.get_mask_file()).exists():
+        raise HTTPException(
+            status_code=404,
+            detail='Episode does not have a mask image',
+        )
+
+    mask_file.unlink(missing_ok=True)
+    request.state.log.debug(f'Deleting {episode} "{mask_file}"')
diff --git a/modules/ref/version_webui b/modules/ref/version_webui
index 6093df5c..bc230c7a 100755
--- a/modules/ref/version_webui
+++ b/modules/ref/version_webui
@@ -1 +1 @@
-v2.0-alpha.13.0-webui9
\ No newline at end of file
+v2.0-alpha.13.0-webui10
\ No newline at end of file