Out of the Unknown (1966) ★ Level Seven (S2E4)

Level Seven (S2E4): In the huge, labyrinthine nuclear bunker meant to shield the survivors in government from the aftermath of atomic war, Level 7 is the deepest and the safest from radiation. But in spite of its hermetic isolation, the nerve center of government is ultimately not safe from the consequences of the holocaust which rages miles overhead. It features Anthony Bate, Keith Buckley, Michele Dotrice, and David Collings. Out of the Unknown is a classic British BBC television science fiction and horror anthology drama series, which was broadcast between 1965 and 1971. It features adaptations of stories by famous authors including Isaac Asimov, J.G. Ballard, Frederik Pohl, and John Wyndham.