How many movies have Donald Houston and Thomas Heathcote acted in together?

They have worked on 4 movies together! Their first movie together was Dance Hall (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). They are most known for their drama films together.