Mike Catherwood was an uncredited floor assistant on the Doctor Who television story The Dalek Invasion of Earth. (INFO: The Dalek Invasion of Earth) He was also the uncredited vision mixer on Doctor Who and the Silurians (INFO: Doctor Who and the Silurians), The Mind of Evil (INFO: The Mind of Evil), The Claws of Axos (INFO: The Claws of Axos) and Day of the Daleks. (INFO: Day of the Daleks)