Answer
Evil Under the Sun is a 1982 British murder mystery film directed by Guy Hamilton and starring Peter Ustinov, Jane Birkin, Maggie Smith, Diana Rigg, and Roddy McDowall. It is the second adaptation of Agatha Christie's 1941 novel of the same name. The film follows Hercule Poirot (Ustinov) as he investigates the murder of a wealthy American businessman on a Mediterranean island.