Mysterie geregisseerd door Francis Searle.
Richard Carlson
Steve Smith ("Whispering Smith")
Greta Gynt
Louise Balfort
Herbert Lom
Roger Ford
Rona Anderson
Anne Carter
Alan Wheatley
Hector Reith
Dora Bryan
Miss La Fosse
Reginald Beckwith
Manson
Daniel Wherry
Dr. Taren
Michael Ward
Hotel Desk Clerk
Danny Green
Cecil
James Raglan
Insp. Dave Meeker
Stuart Nichol
Martin
Laurence Naismith
Parker
Christine Silver
Mrs. Pearson
