Continuity mistake: In the original series Spock mentioned that Vulcan has no moons. In the movie, when Spock is on Vulcan, he looks up and shields his eyes against the glare of the sun. When the scene changes, it is night and there are moons. (Corrected in the Director's Edition).

Star Trek: The Motion Picture (1979)
Ending / spoiler
Directed by: Robert Wise
Starring: William Shatner, George Takei, Leonard Nimoy, Walter Koenig, DeForest Kelley, James Doohan, Nichelle Nichols
V'ger is really Voyager VI. The Creator was NASA. Decker and the V'ger probe (Ilia) merge and evolve into a new life form.
Monty
Suggested correction: Though the planet had no moons, it did form a binary pair with T'Khut and was considered its sister planet. From Memory Alpha.
McCoy: In simpler language, Captain, they drafted me!
Kirk: They didn't.
McCoy: This was your idea! This was your idea, wasn't it?
Kirk: Bones, there's a thing out there...
McCoy: Why is any object we didn't understand always called 'a thing'?
Trivia: If you look at the Kholinar necklace Spock was to be given when he was on Vulcan it bears a striking resemblance to the Enterprise, especially when it is laying on the ground before Spock picks it up.
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