diff --git a/Kyoo.Common/Models/Episode.cs b/Kyoo.Common/Models/Episode.cs
index 9607f201..b833f4ca 100644
--- a/Kyoo.Common/Models/Episode.cs
+++ b/Kyoo.Common/Models/Episode.cs
@@ -32,7 +32,12 @@ namespace Kyoo.Models
 		public string Thumb; //Used in the API response only
 
 
-		public Episode() { }
+		public Episode()
+		{
+			SeasonNumber = -1;
+			EpisodeNumber = -1;
+			AbsoluteNumber = -1;
+		}
 
 		public Episode(long seasonNumber, 
 			long episodeNumber,
diff --git a/Kyoo.Common/Utility.cs b/Kyoo.Common/Utility.cs
index 092d8275..d2afb8de 100644
--- a/Kyoo.Common/Utility.cs
+++ b/Kyoo.Common/Utility.cs
@@ -70,7 +70,7 @@ namespace Kyoo
 			List<T> list = first.ToList();
 			if (isEqual == null)
 				isEqual = (x, y) => x.Equals(y);
-			return list.Concat(second.Where(x => !list.Any(y => isEqual(x, y))));
+			return list.Concat(second.Where(x => !list.Any(y => isEqual(x, y)))).ToList();
 		}
 
 		public static T Complete<T>(T first, T second)