• 
  Chester Morris

  Horatio 'Boston Blackie' Black
• 
  Don McGuire

  Les, the Bus Guide
• 
  Ralph Brooks

  Tourist Sight-Seer
• 
  Harold Fong

  Chinese Victim
• 
  Frank Sully

  Detective Sergeant Matthews
• 
  Edgar Dearing

  Reiber, Policeman
• 
  Peter Brocco

  Rolfe
• 
  Victor Sen Yung

  Movie Theatre Ticket Taker

• 
  Ottola Nesmith

  Solicitous Tourist
• 
  Philip Ahn

  Wong Chung Shee
• 
  Benson Fong

  Ah Hing, Wong's Sales Clerk
• 
  Harry Strang

  Mac McAllister, Policeman
• 
  George Lee

  Fantan Player
• 
  Fred F. Sears

  Police Chemist

• 
  Richard Fantl

  montaj

• 
  Paul Sawtell

  music department
• 
  George Duning

  music department
• 
  Hugo Friedhofer

  music department