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)