diff --git a/src/Sonarr.Api.V3/Series/SeriesResource.cs b/src/Sonarr.Api.V3/Series/SeriesResource.cs
index 7223d7137..84d7fc76f 100644
--- a/src/Sonarr.Api.V3/Series/SeriesResource.cs
+++ b/src/Sonarr.Api.V3/Series/SeriesResource.cs
@@ -149,7 +149,7 @@ public static NzbDrone.Core.Tv.Series ToModel(this SeriesResource resource)
                        AirTime = resource.AirTime,
                        Images = resource.Images,
 
-                       Seasons = resource.Seasons.ToModel(),
+                       Seasons = resource.Seasons?.ToModel() ?? new List<Season>(),
                        Year = resource.Year,
 
                        Path = resource.Path,