Blorgons-Extortion Earth 2150 was a 1965 movie sequel to Inspector Spacetime vs. the Blorgons, with Christopher Lee returning in the role of Inspector Spacetime. It was an adaptation of the television programme's 1963 serial "The Blorgon Incursion of Midgar".

It was very successful at the box office, and another one was planned, potentially based on "The Marathon Pursuit". But when Leslie French announced his decision to leave the Inspector Spacetime programme, BTV producers replaced him with Lee, since he was already familiar to the audience, and dropped their ideas for a third movie.

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