Doctor Who: Season 7, Episode 3 - ProjectFreeTV

7 - 3: A Town Called Mercy

The Doctor and the Ponds arrive in a unsettling western town under siege from a merciless cyborg. Thrust into the role of sheriff, the Doctor attempts to solve the riddle behind the ruthless "Gunslinger" but it is not long before he is thrown into a sense-shattering showdown.