Doctor Who episode 287: The Mind of Evil – Episode Five (27/2/1971)
While UNIT race to stop the Master from launching the stolen Thunderbolt missile, the Doctor has his own challenge: to bring a temporary halt to the alien mind parasite’s increasingly greedy attempts to feed on the evil in Stangmoor Prison. Meanwhile, Mike Yates is strapped to a chair at the launch site, and Jo’s locked in a cell surrounded by sex-starved male prisoners: in context, Mailer’s little air kiss to her is one of the scariest things in the entire series.