diff --git a/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs b/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs
index 409015ee1..313442394 100644
--- a/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs
+++ b/src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs
@@ -26,6 +26,7 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("[ www.Torrenting.com ] - Revenge.S03E14.720p.HDTV.X264-DIMENSION", "DIMENSION")]
         [TestCase("Seed S02E09 HDTV x264-2HD [eztv]-[rarbg.com]", "2HD")]
         [TestCase("7s-atlantis-s02e01-720p.mkv", null)]
+        [TestCase("Eastbound.and.Down.S03E03.1080p.BluRay.x264-TENEIGHTY-RP", "TENEIGHTY")]
         [TestCase("The.Middle.S09E13.720p.HEVC.x265-MeGusta-Pre", "MeGusta")]
         [TestCase("Ghosted.S01E08.Haunted.Hayride.720p.AMZN.WEBRip.DDP5.1.x264-NTb-postbot", "NTb")]
         [TestCase("Ghosted.S01E08.Haunted.Hayride.720p.AMZN.WEBRip.DDP5.1.x264-NTb-xpost", "NTb")]
@@ -35,6 +36,10 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Deadly.Class.S01E10.Sink.With.California.1080p.AMZN.WEB-DL.DDP5.1.H.264-NTG-WhiteRev", "NTG")]
         [TestCase("The.Walking.Dead.S09E12.Guardians.REPACK.1080p.AMZN.WEB-DL.DD.5.1.H.264-CasStudio-BUYMORE", "CasStudio")]
         [TestCase("2.Broke.Girls.S02E24.1080p.AMZN.WEBRip.DD5.1.x264-CasStudio-AsRequested", "CasStudio")]
+        [TestCase("Billions.S04E11.Lamster.1080p.AMZN.WEB-DL.DDP5.1.H.264-NTb-AlternativeToRequested", "NTb")]
+        [TestCase("NCIS.S16E04.Third.Wheel.1080p.AMZN.WEB-DL.DDP5.1.H.264-NTb-GEROV", "NTb")]
+        [TestCase("Will.and.Grace.S10E06.Kid.n.Play.1080p.AMZN.WEB-DL.DDP5.1.H.264-NTb-Z0iDS3N", "NTb")]
+        [TestCase("Absolute.Power.S02E06.The.House.of.Lords.DVDRip.x264-MaG-Chamele0n", "MaG")]
         [TestCase("Series Title - S01E01 - Episode Title [RlsGroup]", "RlsGroup")]
         [TestCase("Black Monday S01 E01-E02 1080p AMZN WEBRip DDP5.1 x264 monkee", null)]
         [TestCase("Series.Title.S01E05.The-Aniversary.WEBDL-1080p.mkv", null)]
diff --git a/src/NzbDrone.Core/Parser/Parser.cs b/src/NzbDrone.Core/Parser/Parser.cs
index 359f5d776..baf4b9d9e 100644
--- a/src/NzbDrone.Core/Parser/Parser.cs
+++ b/src/NzbDrone.Core/Parser/Parser.cs
@@ -337,7 +337,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex SixDigitAirDateRegex = new Regex(@"(?<=[_.-])(?<airdate>(?<!\d)(?<airyear>[1-9]\d{1})(?<airmonth>[0-1][0-9])(?<airday>[0-3][0-9]))(?=[_.-])",
                                                                         RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-        private static readonly RegexReplace CleanReleaseGroupRegex = new RegexReplace(@"^(.*?[-._ ](S\d+E\d+)[-._ ])|(-(RP|1|NZBGeek|Obfuscated|Scrambled|sample|Pre|postbot|xpost|Rakuv[a-z]*|WhiteRev|BUYMORE|AsRequested))+$",
+        private static readonly RegexReplace CleanReleaseGroupRegex = new RegexReplace(@"^(.*?[-._ ](S\d+E\d+)[-._ ])|(-(RP|1|NZBGeek|Obfuscated|Scrambled|sample|Pre|postbot|xpost|Rakuv[a-z]*|WhiteRev|BUYMORE|AsRequested|AlternativeToRequested|GEROV|Z0iDS3N|Chamele0n))+$",
                                                                 string.Empty,
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);