 | Sean Connery | .... | Dr. Paul Bradley |
 | Natalie Wood | .... | Tatiana Nikolaevna Donskaya |
 | Karl Malden | .... | Harry Sherwood, NASA |
 | Brian Keith | .... | Dr. Alexei Dubov |
 | Martin Landau | .... | Major General Adlon |
 | Trevor Howard | .... | Sir Michael Hughes |
 | Richard Dysart | .... | Secretary of Defense |
 | Henry Fonda | .... | The President |
 | Joseph Campanella | .... | Lt. Gen. Easton |
 | Bo Brundin | .... | Rolf Manheim |
 | Katherine De Hetre | .... | Jan Watson |
 | James G. Richardson | .... | Alan Marshall |
 | Roger Robinson | .... | Bill Hunter |
 | Michael Zaslow | .... | Sam Mason |
 | John McKinney | .... | Peter Watson |
 | John Findlater | .... | Astronaut Tom Easton |
 | Paul Tulley | .... | Astronaut Bill Frager |
 | Allen Williams | .... | Astronaut Michael McKendrick |
 | Bibi Besch | .... | Helen Bradley |
 | Gregory Gay | .... | Russian Premier |
 | Clyde Kusatsu | .... | Yamashiro |
 | Burke Byrnes | .... | Coast Guard Officer |
 | Joe Medalis | .... | Bartender |
 | Charles Bartlett | .... | Guard |
 | Raymond O'Keefe | .... | Guard |
 | Henry Olek | .... | Army Captain |
 | Peter Bourne | .... | UN President |
 | Stanley Mann | .... | Canadian U.N. Representative |
 | Ronald Neame | .... | British U.N. Representative |
 | Philip Sterling | .... | Russian U.N. Representative |
 | Arthur Adams | .... | Ghana U.N. Representative |
 | Fred Carney | .... | United States U.N. Representative |
 | Sybil Danning | .... | Swiss Girl Skier |
 | Meschino Paterlini | .... | Swiss Boy Skier |
 | Jon Yune | .... | Siberian Man |
 | Eileen Saki | .... | Siberian Woman |
 | Chris Baur | .... | Communications Center Technician |
 | 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 L. Ehrmann | .... | Communications Center Technician |
 | Johnny Moio | .... | Communications Center Technician |
 | Read Morgan | .... | Communications Center Technician |
 | Conrad Palmisano | .... | Communications Center Technician |
 | Tony Rocco | .... | Communications Center Technician |
 | Jesse Wayne | .... | Communications Center Technician |
 | Carole Hemingway | .... | Gladys, Sherwood's Secretary |
 | Clete Roberts | .... | Network Newscaster |
 | Stu Nahan | .... | Football Announcer |
 | Osman Ragheb | .... | Osman Ragheb |
 | Yang Yu | .... | 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 (Stimme) |
 | Simon Cadell | .... | BBC News Reporter (uncredited) |
 | George Golden | .... | U.N. meeting attendee (uncredited) |
 | Wei Tu Lin | .... | Escaping tenant (uncredited) |
 | Tony Regan | .... | U.N. meeting attendee (uncredited) |
 | John Spencer | .... | Control center worker (uncredited) |
 | Arthur Tovey | .... | U.N. meeting attendee (uncredited) |