AMC has canceled the drama series The Killing for the second time.  The slow-burn serial killer mystery was canceled after its second season following negative reviews and dwindling viewership, but AMC subsequently changed its mind and renewed the show for a third season.  This past season marked a major improvement for the series overall, buoyed by a stellar guest acting turn by Peter Sarsgaard.  But alas, the creative upswing wasn’t enough as viewership was basically flat with season two, and now Deadline reports that AMC has cancelled the show for good this time.  The series starred Joel Kinnaman and Mireille Enos and was run by executive producer Veena Sud.