The Krikkitmen (unproduced TV story)

The Krikkitmen was an unproduced serial written by Douglas Adams and featuring the Fourth Doctor and Sarah Jane. It was to feature a race of androids called the Krikkitmen, built millions of years ago by the inhabitants of the planet Krikkit and instructed to destroy all life in the universe. The Time Lords trapped Krikkit in a temporal prison, and the Fourth Doctor stumbles across a group of Krikkitmen trying to build a key to free Krikkit with 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.