The Flying Serpent

George Zucco

— Prof. Andrew Forbes

Hope Kramer

— Mary Forbes

Ralph Lewis

— Richard Thorpe

Eddie Acuff

— Jerry 'Jonesy' Jones

Wheaton Chambers

— Louis Havener

James Metcalf

— Dr. Lambert

Henry Hall

— Sheriff Bill Hayes

Milton Kibbee

— Hastings (as Miltin Kibbee)

Budd Buster

— Head of Inquest

Terry Frost

— Vance Bennett

Richard Crane

— Hanson, station XOR broadcaster

Al Kunde

— Townsman (uncredited)

Ann Kunde

— Townswoman (uncredited)

George Morrell

— Townsman (uncredited)

Martin Strader

— Townsman (uncredited)

Dorothy Vernon

— Townswoman (uncredited)