How many movies have Leighton Lucas and Richard Todd collaborated on?

They have worked on 4 movies together! Their first movie together was Stage Fright (1950) while their highest rated movie together was Yangtse Incident: The Story of H.M.S. Amethyst (1957). They have not worked together since Yangtse Incident: The Story of H.M.S. Amethyst (1957).