- All-Star Cast: Sean Connery, Natalie Wood, Karl Malden, Brian Keith, Martin Landau, Trevor Howard, Richard Dysart, Henry Fonda.
- Box Office Bomb: Made back merely half of its budget of $16 million.
- Creator Killer: For American International Pictures.
- Fake Russian: The casting of Natalie Wood is (almost) a rare aversion. Her parents were Russian immigrants in real life.
- Old Shame: The majority of the cast hated the film, most notably Natalie Wood. Sean Connery also had nothing nice to say of this film, and was deeply embarrassed to have been a part of it.
- What Could Have Been:
- Donald Pleasence was originally cast as Dr. Alexi Dubov, but had to drop out due to his commitment to Sgt. Pepper's Lonely Hearts Club Band.
- Peter Cushing, John Gielgud, Alec Guinness, John Mills and Ralph Richardson were considered for Sir Michael Hughes.
- John Williams was the film's original composer.
Trivia / Meteor