Season 1
6 episodesAVG 6.90
Best: E3 "All Hallows Eve / The Man in the Suitcase" (7.4)
Season 3
6 episodesAVG 6.52
Best: E5 "Time Out / The Things in Oakwood's Past" (6.9)
Season 4
6 episodesAVG 6.53
Best: E5 "Something Burrowed, Something Blue / Doodles" (6.8)