diff --git a/Shoko.Server/API/v3/Controllers/EpisodeController.cs b/Shoko.Server/API/v3/Controllers/EpisodeController.cs
index 45cf839e1..d01ba3b11 100644
--- a/Shoko.Server/API/v3/Controllers/EpisodeController.cs
+++ b/Shoko.Server/API/v3/Controllers/EpisodeController.cs
@@ -754,7 +754,7 @@ public ActionResult<List<TmdbEpisode>> GetTmdbEpisodesByEpisodeID(
 
     #region All images
 
-    private static readonly HashSet<Image.ImageType> _allowedImageTypes = [Image.ImageType.Poster, Image.ImageType.Banner, Image.ImageType.Backdrop, Image.ImageType.Logo];
+    private static readonly HashSet<Image.ImageType> _allowedImageTypes = [Image.ImageType.Poster, Image.ImageType.Banner, Image.ImageType.Backdrop, Image.ImageType.Logo, Image.ImageType.Thumbnail];
 
     private const string InvalidIDForSource = "Invalid image id for selected source.";