Fixed: Parsing of 2017x123 episode format

src/NzbDrone.Core.Test/ParserTests/SingleEpisodeParserFixture.cs

@@ -125,6 +125,8 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("The.100000.Dollar.Pyramid.2016.S01E05.720p.HDTV.x264-W4F", "The 100000 Dollar Pyramid 2016", 1, 5)]
         [TestCase("Class S01E02 (22 October 2016) HDTV 720p [Webrip]", "Class", 1, 2)]
         [TestCase("this.is.not.happening.2015.0308-yestv", "this is not happening 2015", 3, 8)]
+        [TestCase("Jeopardy - S2016E231", "Jeopardy", 2016, 231)]
+        [TestCase("Jeopardy - 2016x231", "Jeopardy", 2016, 231)]
         //[TestCase("", "", 0, 0)]
         public void should_parse_single_episode(string postTitle, string title, int seasonNumber, int episodeNumber)
         {

src/NzbDrone.Core/Parser/Parser.cs

@@ -87,7 +87,11 @@ namespace NzbDrone.Core.Parser
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 //Episodes with a title, 4 digit season number, Single episodes (S2016E05, etc) & Multi-episode (S2016E05E06, S2016E05-06, S2016E05 E06, etc)
-                new Regex(@"^(?<title>.+?)(?:(?:[-_\W](?<![()\[!]))+S(?<season>(?<!\d+)(?:\d{4})(?!\d+))(?:[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+))(?:(?:\-|[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+)))*)\W?(?!\\)",
+                new Regex(@"^(?<title>.+?)(?:(?:[-_\W](?<![()\[!]))+S(?<season>(?<!\d+)(?:\d{4})(?!\d+))(?:e|\We|_){1,2}(?<episode>\d{2,3}(?!\d+))(?:(?:\-|e|\We|_){1,2}(?<episode>\d{2,3}(?!\d+)))*)\W?(?!\\)",
+                          RegexOptions.IgnoreCase | RegexOptions.Compiled),
+
+                //Episodes with a title, 4 digit season number, Single episodes (2016x05, etc) & Multi-episode (2016x05x06, 2016x05-06, 2016x05 x06, etc)
+                new Regex(@"^(?<title>.+?)(?:(?:[-_\W](?<![()\[!]))+(?<season>(?<!\d+)(?:\d{4})(?!\d+))(?:x|\Wx|_){1,2}(?<episode>\d{2,3}(?!\d+))(?:(?:\-|x|\Wx|_){1,2}(?<episode>\d{2,3}(?!\d+)))*)\W?(?!\\)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 //Mini-Series with year in title, treated as season 1, episodes are labelled as Part01, Part 01, Part.1