The Invisible Monster

Lane Bradford

Burton

Richard Webb

Radio Man

Stanley Price

The Phantom Ruler

Aline Towne

Carol Richards

Roy Gordon

Mr. Moore

Edward Keane

Warren Madison

Douglas Evans

"James Hunter"

Dale Van Sickel

Otto Wagner, aka "Frank Martin"

George Meeker

"Harry Long"

Marshall Reed

Roadblock Cop [Ch. 1, 7]

John Hamilton

"Henry Miller"

David Sharpe

Garage Watchman [Ch. 3] / Armored Car Guard [Ch. 11]

Harold Goodwin

Kirk - Body-Shop Henchman [Ch.11] (uncredited)

George Magrill

Henchman Sam [Ch. 4-5]

John Crawford

Harris