Sergeant Major Zero is a character from the Gerry Anderson production, Terrahawks, and the leader of the zeroids. He is voiced by Windsor Davies and like all zeroids, has lights which substitute as lips. His top light flashes when he is frowning, and his bottom light flashes when he is smiling.

Zero presented Children's ITV in October 1984 and was responsible for introducing the premiere of Thomas the Tank Engine and Friends.

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