New: Series Overview sorted by Next Airing now sorts all remaining items by their Last Aired date.

src/NzbDrone.Core/SeriesStats/SeriesStatisticsRepository.cs

@@ -56,7 +56,8 @@ namespace NzbDrone.Core.SeriesStats
                      SeriesId,
                      SUM(CASE WHEN (Monitored = 1 AND AirdateUtc <= @currentDate) OR EpisodeFileId > 0 THEN 1 ELSE 0 END) AS EpisodeCount,
                      SUM(CASE WHEN EpisodeFileId > 0 THEN 1 ELSE 0 END) AS EpisodeFileCount,
-                     MIN(CASE WHEN AirDateUtc < @currentDate OR EpisodeFileId > 0 OR Monitored = 0 THEN NULL ELSE AirDateUtc END) AS NextAiringString
+                     MIN(CASE WHEN AirDateUtc < @currentDate OR EpisodeFileId > 0 OR Monitored = 0 THEN NULL ELSE AirDateUtc END) AS NextAiringString,
+                     MAX(CASE WHEN AirDateUtc >= @currentDate OR EpisodeFileId = 0 AND Monitored = 0 THEN NULL ELSE AirDateUtc END) AS PreviousAiringString
                      FROM Episodes";
         }