Alibi (1931) is a British mystery detective film directed by Leslie S. Hiscott and adapted by H. Fowler Mear. It starred Austin Trevor, Franklin Dyall, and Elizabeth Allen.
Austin Trevor once claimed he was cast as Poirot because he could speak with a French accent. It was the first of three Poirot adaptations made by Twickenham Film Studios in the 1930s, followed by Black Coffee the same year, and Lord Edgware Dies in 1934, all starring Trevor as Poirot. He later starred in The Alphabet Murders, a 1965 Christie film, playing a minor role.
- Austin Trevor as Hercule Poirot
- Franklin Dyall as Sir Roger Ackroyd
- Elizabeth Allan as Ursula Browne
- J.H. Roberts as Dr. Sheppard
- John Deverell as Lord Halliford
- Ronald Ward as Ralph Ackroyd
- Mary Jerrold as Mrs. Ackroyd
- Mercia Swinburne as Caryll Sheppard
- Harvey Braban as Inspector Davis
With Clare Greet, Diana Beaumont and Earl Grey