Question: Why doesn't Boris the Animal kill Jeffrey Price after he gets the Time Jump Device? He doesn't seem to have problems killing anyone else who gets in his way or helps him. (I don't think saying that if he killed Jeffrey, there's no way J can go into the past is sufficient as that's a plot device.) (00:11:25)
Question: If time travel was banned throughout the universe and they imprisoned Obadiah Price as the inventor (time 1), why didn't MIB confiscate the devices and continually make sure his son Jeffrey never has the devices or lets others use them? He has a log book and Boris the Animal's entry is more than a few pages in (time 2). (00:30:21 - 00:32:00)
Answer: They did, but the son had the knowledge in his head, so he did it in secret. The son dealt in black market devices.
Question: Griffin can almost exactly predict when and what happens next, but when it comes to Boris the animal he can't. Every time Boris got close to Griffin, every possible scenario seems to change. Griffin also says, "Oh no! I didn't think this through or see this happening." Is it some sort of firewall that Boris has on Griffin?
Answer: He doesn't see one future, he sees multiple. So there are multiple possibilities of what is going to happen and he knows all of them and can only predict once something has been confirmed first. This is demonstrated when he and J first meet.
Question: At the Lunar-Max prison, Boris asks the guard to cut the cake for them. But then the guard proceeds to just shove his finger into the center of it why? Was he going to crudely cut the cake with his finger? Is he further checking it? Is he just being a jerk and trying to ruin the cake?
Answer: The last one. He is bullying Boris by ruining his cake.
Question: When Agent J travels into the past, he is being put into a neuralizer because he wouldn't tell young Agent K anything. When the neuralizer was being charged up, why didn't J simply close his eyes?
Answer: This neuralizer works more thoroughly and is more powerful than the simple hand held version. This one goes directly for the brain whilst the hand held goes through the eyes.
Answer: MIB agents wear their sunglasses for a reason whenever they neuralyse people, or else they wouldn't have been needing them if all they needed to do was to close their eyes.
Question: When K is killed in the past, why is it that nobody remembers K (beyond '69 that is) but J remembers everything as it once was?
Chosen answer: This is answered in the movie by the character that gives J the time traveling device. The character tells J that he can still remember K because he was involved in the events. The young black child at Cape Canaveral was a young agent J. So he was there and at least passively involved.
Answer: He meant that adult J already time traveled. In the 1960 's, K met J for the first time, when K met Detective James Edwards that was the second time, which is why he had him apply for MIB.
Question: I really don't understand why K called J? All he said was that he owed him some answers, Regret was the most destructive force in the universe and that he promised him the secrets of the universe and nothing more?
Answer: They had a falling out and K felt like he had to try and patch things up with J.
Answer: He may not have known about the son when he killed Obadiah in the space prison. He thought no one else had a time device. Besides, he was completely focused on his mission. He thought of nothing else.