Deliberate mistake: Dr. Chandra returns to the Leonov at the end of the film with the device that Dr. Floyd designed to cut HAL's memory circuits. He hands the device back to Dr. Floyd, who tosses it in the air and catches it when it falls back into his hand. One problem - there was no gravity on the ship at the time. (01:44:00)
2010 (1984)
1 deliberate mistake - chronological order
Directed by: Peter Hyams
Starring: Helen Mirren, John Lithgow, Roy Scheider, Bob Balaban
Factual error: In the scene where the crew members are doing a simultaneous countdown in Russian and in English, the Russian crewmember skips the number four (chetiri). She goes straight from 5 (pyat) to three (tree). (01:44:14)
HAL-9000: Dr. Chandra, will I dream?
Dr. Chandra: I don't know.
Trivia: While it's well-known the voice of HAL in "2001: A Space Odyssey" is Canadian actor Douglas Rain, who returned to reprise his role in this film, it's less known that the voice of SAL is credited to "Olga Mallsnerd" which is a false name used by none other than Candice Bergen. (00:14:05)
Question: One thing that always confused me is why was it necessary to jettison Discovery after it was used as a booster rocket? Why couldn't they just keep it attached to the Leonov as they made their escape?
Answer: They needed to lighten their load, to make it go faster. In Back to the Future Part III, after hijacking the train, the Doc and Marty unhooked the passenger cars to lighten the load.
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Answer: If they didn't, any further manoeuvring would require much more fuel. They would be moving the mass of two ships.