Characters played by William Gargan
Ellery Queen
Characters played by Margaret Lindsay
Nikki Porter
Characters played by Charley Grapewin
Inspector Queen
Characters played by Ralph Morgan
Alan Rogers
Characters played by Kay Linaker
Margo Rogers
Characters played by Edward Norris
Stewart Cole
Characters played by James Burke
Police Sgt. Velle
Characters played by Addison Richards
Lester C. Young
Characters played by Charles Judels
Corday
Characters played by Andrew Tombes
Bates
Characters played by Claire Du Brey
Deborah - Housekeeper
Characters played by Micheline Cheirel
Marie Dubois
Characters played by Ben Welden
Watchman
Characters played by Milton Parsons
Rogers' Butler
Characters played by Frank O'Connor
Chauffeur
Characters played by Hobart Cavanaugh
Mr. Crandall
Characters played by Kernan Cripps
Forbes - Inspector Queen's Assistant
Characters played by Eddie Kane
Policeman
Characters played by Charles Lane
Coroner
Characters played by Harry Tyler
Tattoo Artist