Films produced here include "Invader" (1936) with Buster Keaton; "Under Secret Orders" (1937) otherwise called "Mademoiselle Docteur", with Erich von Stroheim; "The Small Back Room" (1949); "State Secret" (1950) with Douglas Fairbanks Jnr. Shooting of "The Third Man" began here in 1948 before moving to Shepperton. In 1951, shortly before the studios closed, much of "The African Queen" was filmed here. For instance, the scenes in which Bogart and Hepburn are seen in the water were all shot in studio tanks at Isleworth Studios, Middlesex. These scenes were considered too dangerous to shoot in Africa. All of the foreground plates for the process shots were also done in studio.