The Krikkitmen (unproduced TV story)

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The Krikkitmen was an unproduced serial written by Douglas Adams and featuring the Fourth Doctor and Sarah Jane Smith. It was to feature a race of androids called the Krikkitmen, heralding from the planet Krikkit and aiming to destroy all life in the universe. The Time Lords used a temporal prison to lock Krikkit away, but the Fourth Doctor stumbled across a group of Krikkitmen trying to free Krikkit using a key built from parts from the Earth game of cricket.

This script was rejected by editor Robert Holmes in 1976. In 1980, Adams retooled the script as a feature film called Doctor Who and the Krikkitmen and submitted it to Paramount Pictures; after nothing came of this plan, he put many of ideas into his book Life, the Universe, and Everything.