Fair rating?Doctor Who· Season 12 · Episode 8
The Ark in Space, Part Four
The Doctor tries to protect the humans still in cryogenic suspension from the Wirrn, who are determined to use Earth as their new breeding ground.
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#20In Season 12of 20 rated episodes
#373All-timeof 700 rated episodes
−0.5vs season avgSeason 12 averages 9.1
1975First airedFebruary 15, 1975