Tom Steele as The Masked Marvel

Louise Currie as Alice Hamilton

Johnny Arthur as Mura Sakima

William Forrest as Martin Crane

Anthony Warde as 'Killer' Mace

Rod Bacon as Jim Arnold

Richard Clarke as Frank Jeffers

David Bacon as Bob Barton

Bill Healy as Terry Morton

Howard Hickman as Warren Hamilton

Eddie Parker as Meggs

Kenneth Harlan as Gas Works Policeman

Thomas Louden as Matthews

Duke Green as Carl - Delivery-Truck Thug / Spike - Gas works saboteur / Kaler - Roof-top thug

Dale Van Sickel as Tall Gas-Works Saboteur / Station-Wagon Thug / Super-X Warehouse Thug #1

Wendell Niles as Newscaster

Lester Dorr as Reporter #1