Characters played by William Gargan
Ellery Queen
Characters played by Margaret Lindsay
Nikki Porter
Characters played by John Litel
Norman Hadley
Characters played by Charley Grapewin
Insp. Queen
Characters played by James Burke
Sgt. Velie
Characters played by Frank M. Thomas
Capt. H.T. Daley
Characters played by Lilian Bond
Adele Belden
Characters played by Morgan Conway
Ray Stafford
Characters played by Jack La Rue
Tommy Gould
Characters played by Noel Madison
George Belden
Characters played by Charlotte Wynters
Mrs. Irene Evington Hadley
Characters played by Johnny Arthur
Riley - Reporter
Characters played by Jimmy Aubrey
Door Sign Painter
Characters played by Marie Blake
Motel Landlady
Characters played by Billy Bletcher
Quarantine Sign Poster
Characters played by Ralph Brooks
Gambling Casino Patron
Characters played by Arthur Q. Bryan
Waymond Wadcwiff
Characters played by Jack Chefe
Waiter
Characters played by Byron Foulger
Freddy Froelich
Characters played by Willie Fung
Chinese Waiter
Characters played by Bernard Gorcey
Man with Tires at Nightclub
Characters played by Harrison Greene
Charlie
Characters played by Donald Kerr
Burlesque House Barker
Characters played by Matt McHugh
Hotel Manager
Characters played by William Newell
Reporter on Telephone
Characters played by Gil Perkins
Tough Woman's Escort at Bar
Characters played by Jack Rice
Railroad Ticket Clerk
Characters played by Ronald R. Rondell
Eddie - Croupier
Characters played by Virginia Sale
Mrs. Plumpkin - Landlady
Characters played by Syd Saylor
Fingers Muldoon
Characters played by Harry Tenbrook
Doorman Hailing Taxis
Characters played by Guy Usher
Police Detective
Characters played by Russell Wade
Gambling Casino Patron