Noel Madison
— Dominic
Dennis Moore
— Secret Service Agent Evans
Charles D. Brown
— George D. Waldron
William Edmunds
— Samuel 'The Dutchman' Welker
John Wray
— Bowers the Printer
Wade Boteler
— Police Sergeant (uncredited)
Egon Brecher
— Samuels the Druggist (uncredited)
Frank Orth
— Tobacconist (uncredited)
Emmett Vogan
— Lab Technician Welsh (uncredited)
Charles Wagenheim
— Brand the Printer (uncredited)
E. Alyn Warren
— Pawnbroker (uncredited)