Alfred Hitchcock
(Man Boarding Train Carrying a Double Bass (uncredited)) ,
Leo G. Carroll
(Sen. Morton) ,
Brooks Benedict
(Tennis Umpire (uncredited)) ,
John Brown
(Prof. Collins) ,
Oliver Cross
(Party Guest (uncredited)) ,
John Doucette
(Det. Hammond (uncredited)) ,
Robert Gist
(Det. Leslie Hennessey) ,
Farley Granger
(Guy Haines) ,
Jonathan Hale
(Mr. Antony) ,
Stuart Hall
(Tennis Match Spectator (uncredited)) ,
Harry Hines
(Man Under Merry-Go-Round (uncredited)) ,
Patricia Hitchcock
(Barbara Morton) ,
Marion Lorne
(Mrs. Antony) ,
Paul McGuire
(Train Passenger (uncredited)) ,
Kasey Rogers
(Miriam Haines) ,
Ruth Roman
(Anne Morton) ,
Howard St. John
(Police Capt. Turley) ,
Norma Varden
(Mrs. Cunningham) ,
Robert Walker
(Bruno Antony) , Tom Ferrandini (Linesman (uncredited))