Roddy McDowall

Cornelius

Kim Hunter

Dr. Zira

Bradford Dillman

Dr. Lewis Dixon

Natalie Trundy

Dr. Stephani...

Eric Braeden

Dr. Otto Hasslein

William Windom

The President

Sal Mineo

Dr. Milo

Albert Salmi

E-1

Jason Evers

E-2

John Randolph

Committee Chairman

Harry Lauter

General Winthrop

M. Emmet Walsh

Aide

Roy Glenn

Lawyer (as R...

Peter Forster

Cardinal

Norman Burton

Army Officer

William Woodson

Naval Officer

Tom Lowell

Orderly

Gene Whittington

Marine Captain

Donald Elson

Curator

Bill Bonds

TV Newscaster

Army Archerd

Referee

James Bacon

General Faulkner

Ricardo Montalban

Armando

John Alderman

Marine Corpo...

Alan Baxter

General (unc...

Jack Berle

Secretary of...

Paul Bradley

Official at ...

Karl Bruck

German Newsc...

Sam Chew Jr.

Undetermined...

Robert Cole

Reporter (un...

Walker Edmiston

Talking Baby...

Sig Frohlich

Spectator (u...

James W. Gavin

Helicopter P...

George Golden

Official at ...

James Gonzalez

Official at ...

Joe Gray

Bodyguard (u...

Bob Harks

Aide (uncredited)

Linda Harrison

Nova (archiv...

Elizabeth Harrower

Reporter at ...

Shep Houghton

Bystander (u...

Joseph La Cava

Waiter (uncr...

Robert Nichols

Reporter (un...

Ron Pinkard

Undetermined...

Janos Prohaska

Heloise (unc...

Tony Regan

Reporter at ...

Stephen Roberts

Gen. Brody (...

Hank Robinson

Reporter (un...

James B. Sikking

Control Room...

Jack Slate

Reporter (un...

Arthur Tovey

Official at ...

William Tregoe

Hotel Recept...

William Beckley

British News...