Warren William as Michael Lanyard / The Lone Wolf

Marguerite Chapman as Eve Andrews

Eric Blore as Jamison

Mona Barrie as Jane Merrick

Tala Birell as Sonia Budenny

Margaret Hayes as Patricia Blake (Shaw)

Ann Savage as Vivian

Thurston Hall as Inspector Crane

Warren Ashe as Sidney Shannon

Fred Kelsey as Detective Dickens

Gerald Mohr as Harry Cooper

Louis Jean Heydt as Arthur

Frank Sully as Hertzog - Henchman

Eddie Marr as Mac, Henchman

Roger Clark as John Sheldon II

Gregory Gaye as Dr. Eric Budenny (as Gregory Gay)

Nina Vale as Coatroom Girl (uncredited)

Lloyd Bridges as Airline Gate Attendant (uncredited)