An American family – Dr. Benjamin "Ben" McKenna, his wife, popular singer Josephine “Jo” Conway McKenna, and their son Henry "Hank" McKenna – are vacationing in Morocco. Traveling from Casablanca to Marrakesh, they meet Frenchman Louis Bernard. He seems friendly, but Jo is suspicious of his many questions and evasive answers. Bernard offers to take the McKennas to dinner, but cancels when a sinister-looking man knocks at the McKennas' hotel-room door. At a restaurant, the McKennas meet friendly English couple Lucy and Edward Drayton. The McKennas are surprised to see Bernard arrive and sit elsewhere, apparently ignoring them. Directed by Alfred Hitchcock Produced by Alfred Hitchcock Screenplay by John Michael Hayes Story by Charles Bennett D. B. Wyndham-Lewis Starring James Stewart Doris Day Brenda de Banzie Bernard Miles Christopher Olsen Daniel Gélin Reggie Nalder Music by Bernard Herrmann Cinematography Robert Burks Edited by George Tomasini