Doctor Who episode 408: Planet of Evil – Part Three (11/10/1975)
There’s a last gasp of Pertwee-era psychedelia when the Doctor plunges into the anti-matter void (which trips him into a Pertwee-style coma). It’s the equivalent of the slo-mo troll battle in The Three Doctors. The rest of this is far less ethereal; the menace absolutely tangible. Presumably some of this is due to the influence of Robert Holmes – at least the character of De Haan, a grumbling working man, absolutely feels like a Holmes type, as does the joke about Morelli’s funeral (‘Morestran Orthodox’). The horror here comes from people doing awful things: Sorenson, obsessed by his own genius, has allowed himself to be contaminated by the planet, transforming into a cross between a werewolf and Professor Stahlman. Salamar is just frightened and out of his depth, desperate to escape Zeta Minor, and willing to bury the Doctor and Sarah Jane alive in the vacuum of space.