Cast
Horatio «Boston Blackie» Black
Doris Bradley
Insp. William R. Farraday
Joan Howell
Igor Borio
The Runt
Detective Sergeant Matthews
Margie O'Reilly, alias Sandra Doray
Receptionist, not listed in creditsа
Mrs. Helen Kenyon, not listed in creditsа
Police Matron, not listed in creditsаMrs. Worthington, Dowager, not listed in creditsа 
Party Guest, not listed in credits
Party Guest, not listed in creditsа
Mason Carter, not listed in creditsParty Guest, not listed in credits Henry, the Desk Clerk, not listed in credits Police Officer, not listed in credits 
Party Guest, not listed in credits
Janitor, not listed in credits
Claire Carter, not listed in creditsаMrs. Treadwell, Dowager, not listed in creditsа 
Dunn, Carter's Attorney, not listed in credits
Louis Gehrig aka Lonely Louie aka Louie the Fence, not listed in credits