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Roddy McDowall - CorneliusKim Hunter - Dr. ZiraBradford Dillman - Dr. Lewis DixonNatalie Trundy - Dr. Stephanie 'Stevie' BrantonEric Braeden - Dr. Otto HassleinWilliam Windom - The PresidentSal Mineo - Dr. MiloAlbert Salmi - E-1Jason Evers - E-2John Randolph - Committee ChairmanHarry Lauter - General WinthropM. Emmet Walsh - AideRoy Glenn - Lawyer (as Roy E. Glenn Sr.)Peter Forster - CardinalNorman Burton - Army OfficerWilliam Woodson - Naval OfficerTom Lowell - OrderlyGene Whittington - Marine CaptainDonald Elson - CuratorBill Bonds - TV NewscasterArmy Archerd - RefereeJames Bacon - General FaulknerRicardo Montalban - ArmandoJohn Alderman - Marine Corporal (uncredited)Alan Baxter - General (uncredited)Jack Berle - Secretary of State (uncredited)Paul Bradley - Official at Briefing (uncredited)Karl Bruck - German Newscaster (uncredited)Sam Chew Jr. - Undetermined (uncredited)Robert Cole - Reporter (uncredited)
Ratings
from TMDB6.4/ 101,294 votes