Doctor Who Season 8 Episode 20 Colony in Space (6) 1971
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The Doctor and the Master are taken into the Primitive city, where the Master hopes to find the doomsday weapon, while Dent forces the colonists to leave the planet even though their ship is likely to explode.
Released: 1971-05-15
Runtime : 60 minutes
Genre : Drama, Action & Adventure, Sci-Fi & Fantasy