WAR AT SEA FILM SEASON: We Dive At Dawn Trailer 1943 We Dive at Dawn is a 1943 war film directed by Anthony Asquith, starring John Mills and Eric Portman as Royal Navy submariners in the Second World War. It was written by Val Valentine and J. B. Williams with uncredited assistance from Frank Launder. It was produced by Edward Black. The film's sets were designed by Walter Murton. Plot: Lieutenant Taylor (John Mills) and the rest of the crew of the submarine Sea Tiger are given a week's leave af