Fred Holliday

as Bob Sibley

as Amos

as Fred Dunbar

as Frank McIntosh

as Newscaster

as Russ

as Professor Whitmore

as Dr. Whitmore

as Anchor Man

as Larry Hamilton

as David Callaway

as U. N. Official #1

as Mr. Brooks

as Judge

as Newscaster

as Dr. Bruce Kimball

as Atherton

as Brendan Riley

as TV Reporter

as Devore

as Harkness

as Crawford

as Sgt. Topf

as Crawford

as Patrolman

as Military Computer Entry - Missile Launch (uncredited)

as C-47 Transport Pilot (uncredited)

as Dr. Barnes

as Jay Simmons

as Ernest Fields

as Paul Soren

as Party Guest

as Man (uncredited)

as Agent

as Agent Mark Kress

as Agent Davis

as Emmet

as Duty Officer

as Telegraph Operator

as John Tremont

as Slow Boy (uncredited)

as Harper