Warren William
— Michael Lanyard / The Lone Wolf
Marguerite Chapman
— Eve Andrews
Eric Blore
— Jamison
Mona Barrie
— Jane Merrick
Tala Birell
— Sonia Budenny
Margaret Hayes
— Patricia Blake (Shaw)
Ann Savage
— Vivian
Thurston Hall
— Inspector Crane
Warren Ashe
— Sidney Shannon
Fred Kelsey
— Detective Dickens
Gerald Mohr
— Harry Cooper
Louis Jean Heydt
— Arthur
Frank Sully
— Hertzog - Henchman
Eddie Marr
— Mac, Henchman
Roger Clark
— John Sheldon II
Gregory Gaye
— Dr. Eric Budenny (as Gregory Gay)
Nina Vale
— Coatroom Girl (uncredited)
Lloyd Bridges
— Airline Gate Attendant (uncredited)