Don't search for episodes in series that haven't aired yet

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

@@ -104,6 +104,7 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Entourage - S02E02 - My Maserati Does 185", "Entourage", 2, 2)]
         [TestCase("6x13 - The Family Guy 100th Episode Special", "", 6, 13)]
 //        [TestCase("Heroes - S01E01 - Genesis 101 [HDTV-720p]", "Heroes", 1, 1)]
+        [TestCase("The 100 S02E01 HDTV x264-KILLERS [eztv]", "The 100", 2, 1)]
         //[TestCase("", "", 0, 0)]
         public void should_parse_single_episode(string postTitle, string title, int seasonNumber, int episodeNumber)
         {

src/NzbDrone.Core/IndexerSearch/EpisodeSearchService.cs

@@ -115,7 +115,10 @@ namespace NzbDrone.Core.IndexerSearch
             if (message.SeriesId > 0)
             {
                 episodes = _episodeService.GetEpisodeBySeries(message.SeriesId)
-                                          .Where(e => e.Monitored && !e.HasFile)
+                                          .Where(e => e.Monitored &&
+                                                 !e.HasFile &&
+                                                 e.AirDateUtc.HasValue &&
+                                                 e.AirDateUtc.Value.Before(DateTime.UtcNow))
                                           .ToList();
             }