Elenco
Tristram Coffin
Prof. Jeff King
Mae Clarke
Glenda Thomas
Don Haggerty
Tony Dirken
House Peters Jr.
Burt Winslow
James Craven
Prof. Millard
I. Stanford Jolley
Prof. Bryant
Ted Adams
Martin Conway
Marshall Bradford
Dr. Graffner
Stanley Price
Gunther von Strum
Douglas Evans
Civil Defense Chairman
Arvon Dale
Chairman's Aide
Tom Steele
Henchman
Dale Van Sickel
Henchman
David Sharpe
Henchman
Carey Loftin
Henchman
Bud Wolfe
Henchman
Frank O'Connor
Old Watchman
Art Gilmore
Radio Voice