Question: Who directed The Ghost Train film, which was based on the play written by Arnold Ridley?
Sentence (from "Arnold Ridley"): William Arnold Ridley, OBE (7 January 1896 – 12 March 1984) was an English playwright and actor, first notable as the author of the play "The Ghost Train" and later in life for portraying the elderly Private Godfrey in the British sitcom "Dad's Army" (1968–1977).
Relevant evidence: Yes