Continuity mistake: After the time line is fixed, J meets K in the diner. In one shot, the spoon that is by K's plate moves to the edge of the table, then a few shots later it's back to its original position. (01:36:25)
Men in Black 3 (2012)
Ending / spoiler
Directed by: Barry Sonnenfeld
Starring: Tommy Lee Jones, Will Smith, Emma Thompson, Josh Brolin, Alice Eve, Jemaine Clement
The younger version of Agent K kills Boris, but not before Boris kills the helpful NASA colonel who helped J and K. A little boy comes out - it turns out the little boy is a young J, and the colonel was his father. K reluctantly neuralyzes young J and promises that he will be looked after. Older J returns to present day, where K is alive and all is well.
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More mistakes in Men in Black 3
Cop 1: Well, look at this. Power windows, power seats. I bet you the thing cost 6 grand.
Agent J: Ah, yes, and it has a roof, but it's hidden.
Cop 2: Hey, what kind of work do you do? An individual of your... Particular ethic persuasion?
Agent J: Mmm...
Cop 1: Maybe he's a noted athlete.
Agent J: Mmmm! Yes. Starting forward for the Detroit Darkies.
Cop 1: Where'd you get the car?
Cop 2: And the suit?
Agent J: I stole them both. Uh, car from your wife, suit from your grandmother.
Trivia: During the Apollo 11 launch, the film cuts to various people watching it on television. One of the people is Barry Sonnenfeld, the director of the Men in Black films.
Question: J said that that's not what he was asking O, so what was he asking her?
Answer: Earlier in the movie, the way K was talking about Boris was different than what J had come to expect of his partner. So J wanted to know what happened between Boris and K at Cape Canaveral that changed him. So more of what did Boris do to K rather than just the report of what K did.