Writing Ian Hay Other Credits Girls at Sea Theatre Play 1958 The Middle Watch Theatre Play 1940 An Englishman's Home Writer 1940 The Return of the Frog Screenplay 1938 Housemaster Novel 1938 The Frog Adaptation 1937 Sabotage Dialogue 1937 Farewell Again Writer 1937 The Man Behind the Mask Dialogue 1936 Secret Agent Writer 1936 All at Sea Theatre Play 1936 The Widow from Monte Carlo Writer 1935 Me and Marlborough Dialogue 1935 The 39 Steps Dialogue 1935 Admirals All Writer 1935 I Was a Spy Writer 1933 Orders Is Orders Original Story 1933 Leave It to Me Writer 1933 The Midshipmaid Theatre Play 1932 Tilly of Bloomsbury Theatre Play 1931 Agent-readable