Chester Morris
Horatio 'Boston Blackie' Black
June Vincent
Doris Howell
Richard Lane
Insp. William R. Farraday
Patricia Barry
Joan Howell (as Patricia White)
George E. Stone
The Runt
Frank Sully
Sgt. Matthews
Edward Norris
Igor Borio
Fay Baker
Margie O'Reilly, alias Sandra Doray
William Forrest
Mason Carter
Sarah Selby
Claire Carter
Mary Currier
Helen Kenyon
Bess Flowers
Party guest