William Duff-Griffin

as Newsreel Scientist

as Mr. Christie

as Dr. George Sullivan

as Paddy

as Mr. Laughton

as Mr. Brown

as Dr. Myron

as Narrator / Buzz / Santa

as Caterer

as Willy / Senator (archive footage)

as FBI Librarian

as Warden

as Professor

as Conductor

as Fletcher

as Fletcher (uncredited)