Drone factory would throw exception on unknown series instead of proper error.

src/NzbDrone.Core.Test/MediaFiles/DownloadedEpisodesImportServiceFixture.cs

@@ -16,6 +16,7 @@ using NzbDrone.Core.Qualities;
 using NzbDrone.Core.Test.Framework;
 using NzbDrone.Core.Tv;
 using NzbDrone.Test.Common;
+using FluentAssertions;
 
 namespace NzbDrone.Core.Test.MediaFiles
 {
@@ -195,6 +196,20 @@ namespace NzbDrone.Core.Test.MediaFiles
                 .Verify(v => v.GetSeries(It.Is<String>(s => s.StartsWith(prefix))), Times.Never());
         }
 
+        [Test]
+        public void should_return_importresult_on_unknown_series()
+        {
+            var fileName = @"C:\folder\file.mkv".AsOsAgnostic();
+
+            var result = Subject.ProcessFile(new FileInfo(fileName));
+
+            result.Should().HaveCount(1);
+            result.First().ImportDecision.Should().NotBeNull();
+            result.First().ImportDecision.LocalEpisode.Should().NotBeNull();
+            result.First().ImportDecision.LocalEpisode.Path.Should().Be(fileName);
+            result.First().Result.Should().Be(ImportResultType.Rejected);
+        }
+
         private void VerifyNoImport()
         {
             Mocker.GetMock<IImportApprovedEpisodes>().Verify(c => c.Import(It.IsAny<List<ImportDecision>>(), true, null),

src/NzbDrone.Core/MediaFiles/DownloadedEpisodesImportService.cs

@@ -132,7 +132,7 @@ namespace NzbDrone.Core.MediaFiles
             if (series == null)
             {
                 _logger.Debug("Unknown Series for file: {0}", fileInfo.Name);
-                return new List<ImportResult>() { new ImportResult(null, String.Format("Unknown Series for file: {0}", fileInfo.Name)) };
+                return new List<ImportResult>() { new ImportResult(new ImportDecision(new LocalEpisode { Path = fileInfo.FullName }, "Unknown Series"), String.Format("Unknown Series for file: {0}", fileInfo.Name)) };
             }
 
             if (_diskProvider.IsFileLocked(fileInfo.FullName))

src/NzbDrone.Core/MediaFiles/EpisodeImport/ImportResult.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using NzbDrone.Common;
+using NzbDrone.Common.EnsureThat;
 
 namespace NzbDrone.Core.MediaFiles.EpisodeImport
 {
@@ -27,6 +28,8 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport
 
         public ImportResult(ImportDecision importDecision, params String[] errors)
         {
+            Ensure.That(importDecision, () => importDecision).IsNotNull();
+
             ImportDecision = importDecision;
             Errors = errors.ToList();
         }