Warren William

as Michael Lanyard / The Lone Wolf

Ann Savage

as Valerie King

Eric Blore

as Llewellyn Jameson

Robert Stanford

as Donald Jameson

Sheldon Leonard

as Johnny Booth

Lloyd Bridges

as Fritz

Gavin Muir

as Karl

Grace Lem

as Chinese Lady at Nightclub

Sig Arno

as Mr. Whistler

Frank Arnold

as French Waiter

Frances Chan

as Chinese Lady at Nightclub

Darby Jones

as Bellboy

Frank Lackteen

as Laundry Proprietor

Mal Merrihugh

as Chauffeur

Louis Merrill

as Mr. Rembrandt

Jay Novello

as Mr. Cezanne

Frank O'Connor

as Wembley Agent

Jack Rice

as Hotel Night Clerk

Floyd Shackelford

as Bellboy

Gene Stone

as Bartender

Nick Thompson

as Henchman in Laundry

John Tyrrell

as Wembley Agent

Frederick Worlock

as Sir Roger Wembley