SeriesProvider.GetSeries(int seriesId) will now fail if series is not found.

NzbDrone.Core.Test/SeriesProviderTest.cs

@@ -106,6 +106,7 @@ namespace NzbDrone.Core.Test
 
 
         [Test]
+        [ExpectedException(typeof(InvalidOperationException), ExpectedMessage = "Sequence contains no elements")]
         public void Get_series_invalid_series_id_should_return_null()
         {
             var mocker = new AutoMoqer();

NzbDrone.Core/Providers/SeriesProvider.cs

@@ -44,11 +44,9 @@ namespace NzbDrone.Core.Providers
 
         public virtual Series GetSeries(int seriesId)
         {
-           var series = _database.SingleOrDefault<Series>("WHERE seriesId= @0", seriesId);
-            if (series != null)
-            {
-               series.QualityProfile = _qualityProvider.Get(series.QualityProfileId);
-            }
+            var series = _database.Single<Series>("WHERE seriesId= @0", seriesId);
+            series.QualityProfile = _qualityProvider.Get(series.QualityProfileId);
+
             return series;
         }