BBC1 airs the 33rd episode of Doomwatch. This episode, guest starring Madhav Sharma (Moonbase 3) and Marc Zuber (The Changes) no longer exists in the BBC’s archives.
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Also of interest...
Doctor Who: The Face Of Evil, Part 2
January 8, 1977
The Avengers: Dead On Course
December 29, 1962
Twilight Zone: Episode 21
March 21, 1986