Factual error: Avon and Grant use an electric torch to melt the ice covering the bomb. When it's removed from its hiding place, it is suddenly completely dry and clean: not a trace of ice, water or dirt on it anywhere. (00:36:00)
Blake's 7 (1978)
1 factual error in Countdown - chronological order
Starring: Jan Chappell, Michael Keating, Paul Darrow, Peter Tuddenham
Time Squad - S1-E4
Continuity mistake: During Blake's first encounter with Cally, the smudges on the front of his tunic (including a big chalky footprint left by her boot) disappear, reappear and rearrange themselves several times between shots. (00:31:20)
More trivia for Blake's 7