After World War II, during which he served in the Royal Canadian Navy, Langley worked on many British films. He also co-wrote the hit West End play "Edward, My Son" with Robert Morley. His film credits include the film noir "They Made Me a Fugitive" (1947), the remake of "Tom Brown's Schooldays" (1951), the Alastair Sim "Scrooge" (1951), "The Pickwick Papers" (1952), "Ivanhoe" (1952) and the Technicolor "The Prisoner of Zenda" (1952). (His contribution to "Zenda", however, was minimal, since the 1952 film followed the script nearly word-for-word the 1937 film version, on which Langley did "not" work.)