How many movies have Michael Wisher and Terrance Dicks collaborated on?

They have worked on 5 movies together! Their first movie together was Doctor Who: Terror of the Autons (1971) while their highest rated movie together was Doctor Who: Carnival of Monsters (1973). They have not worked together since Shakedown: Return of the Sontarans (1994). They are most known for their science fiction films together.