Sean Connery

Paul Bradley

Natalie Wood

Tatiana Donskaya

Karl Malden

Harry Sherwood

Brian Keith

Dr. Dubov

Martin Landau

General Adlon

Trevor Howard

Sir Michael Hughes

Richard Dysart

Secretary of Defense

Henry Fonda

The President

Joseph Campanella

General Easton

Bo Brundin

Rolf Manheim

James G. Richardson

Alan Marshall

Roger Robinson

Bill Hunter

Michael Zaslow

Sam Mason

John Findlater

Astronaut Tom Easton

Allen Williams

Astronaut Michael McKendrick

Bibi Besch

Helen Bradley

Gregory Gaye

Russian Premier

Clyde Kusatsu

Yamashiro

Burke Byrnes

Coast Guard Officer

Stanley Mann

Canadian Representative

Ronald Neame

British Representative

Philip Sterling

Russian Representative

Sybil Danning

Girl Skier

Joan Foley

Communications Center Technician

Conrad E. Palmisano

Communications Center Technician

Stu Nahan

Football Announcer

James Bacon

News Reporter

Domingo Ambriz

Boy with Radio

Peter Donat

Opening Sequence Narrator (voice)

Simon Cadell

British News Reporter (uncredited)