Ed Prentiss

as General

as Doctor

as Zachary, Ad Council Member (uncredited)

as Judge No. 1

as Bollinger (uncredited)

as Stanley Leeds

as Justice Department

as U.S. Marshal

as John / Ralph Bordeen

as James Fuller (uncredited)

as Duty Controller

as Major Grant

as Doctor Burns

as Narrator / Sam the Agent (uncredited)

as Barker (uncredited)

as Narrator, Policeman

as Mr. Nelson

as Narrator (voice) (uncredited)

as Mr. Duffy (uncredited)

as Captain Farrell

as Mr. Boardman

as Mr. Franklin

as Mr. Marshall

as Professor Beest Lee (voice)

as Pete Cahurn