Edmund Lowe

as T.N. Thompson / Mr. Dynamite

Jean Dixon

as Lynn Marlo

Victor Varconi

as Jarl Dvorjak

Esther Ralston

as Charmian Dvorjak

Verna Hillie

as Mona Lewis

Minor Watson

as Clark Lewis

Robert Gleckler

as James V. King - Chief of Detectives

Jameson Thomas

as Carey Williams

Greta Meyer

as Jans

Frank Lyman

as D.H. Matthews

G. Pat Collins

as Rod

Bradley Page

as Felix

James P. Burtis

as Joe

Matt McHugh

as Sunshine