Sean Connery
Dr. Paul Bradley
Karl Malden
Harry Sherwood, NASA
Henry Fonda
The President
Brian Keith
Dr. Alexei Dubov
Natalie Wood
Tatiana Nikolaevna Donskaya
Trevor Howard
Sir Michael Hughes
Martin Landau
Major General Adlon
Richard Dysart
Secretary of Defense
Joseph Campanella
General Easton
Katherine De Hetre
Jan Watkins
James G. Richardson
Alan Marshall
Roger Robinson
Bill Hunter
John McKinney
Peter Watson
John Findlater
Astronaut Tom Easton
Paul Tulley
Astronaut Bill Frager
Allen Williams
Astronaut Michael McKendrick
Gregory Gaye
Russian Premier
Burke Byrnes
Coast Guard Officer
Henry Olek
Army Translator
Peter Bourne
U.N. President
Stanley Mann
Canadian Representative
Ronald Neame
British Representative
Philip Sterling
Russian Representative
Arthur Adams
Ghana Representative
Fred Carney
United States Representative
Meschino Paterlini
Boy Skier
Eileen Saki
Siberian Woman
Christine Anne Baur
Communications Center Technician (as Chris Baur)
Paul Camen
Communications Center Technician
Dorothy Catching
Communications Center Technician
Bill Couch
Communications Center Technician
William Darr
Communications Center Technician
Joan Foley
Communications Center Technician
Paul Laurence
Communications Center Technician
Johnny Moio
Communications Center Technician
Read Morgan
Communications Center Technician
Conrad E. Palmisano
Communications Center Technician
Tony Rocco
Communications Center Technician
Jesse Wayne
Communications Center Technician
Carole Hemingway
Sherwood's Secretary
Clete Roberts
Network Newscaster
Stu Nahan
Football Announcer
Osman Ragheb
Swiss TV Newscaster
Yu Wing
Chinese Fisherman
Yau Tsui Ling
Chinese Fisherman's Wife
Rick Slaven
Canteen Worker
James Bacon
News Reporter
Yani Begakis
News Reporter
Selma Archerd
Woman in Subway
Domingo Ambriz
Boy with Radio
Peter Donat
Opening Sequence Narrator (voice)
Simon Cadell
British News Reporter (uncredited)
Philip Ettington
Boy in Subway (uncredited)