
It starts with a shriek of a train whistle... and ends with shrieking excitement!
A charming psychopath tries to coerce a tennis star into his theory that two strangers can commit the perfect crime by exchanging murders—each killing the other’s most-hated person.
Marion Lorne
Mrs. Antony

Jonathan Hale
Mr. Antony

Howard St. John
Captain Turley

John Brown
Prof. Collins

Norma Varden
Mrs. Cunningham

Robert Gist
Leslie Hennessey

Brooks Benedict
Tennis Umpire (uncredited)

John Doucette
Detective Hammond (uncredited)

Harry Hines
Man Under Merry-Go-Round (uncredited)

Alfred Hitchcock
Man Boarding Train Carrying Double Bass (uncredited)