Fix regex for expanded series + episode number (S01 - E01)

src/NzbDrone.Core/Parser/Parser.cs

@@ -115,7 +115,7 @@ namespace NzbDrone.Core.Parser
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 // Separated season and episode numbers S01 - E01
-                new Regex(@"^(?<title>.+?)\WS(?<season>\d{2}(?!\d+))(\W-\W)E(?<episode>(?<!\d+)\d{2}(?!\d+))(?!\\)",
+                new Regex(@"^(?<title>.+?)(?:_|-|\s|\.)+S(?<season>\d{2}(?!\d+))(\W-\W)E(?<episode>(?<!\d+)\d{2}(?!\d+))(?!\\)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
                 //Season only releases