- Complete Monster: Boris, known as the Animal, is by far the most murderously sadistic villain in the films, and easily the most personal. He is introduced being freed from prison by his girlfriend, whom he lets die when she is blown out into space, and kills another prisoner whom he promised to take with him. He travels back in time to eliminate K as personal revenge for destroying his arm when he was captured, causing a present day invasion by his race of Boglodites to consume everyone on Earth, which is his ultimate goal. Boris despises his nickname of the Animal, and will kill anyone who refers to him by it. A remorseless butcher who isn't afraid to kill anyone in his way, he kills a number of targets in the past, finds his past self so pathetic he only refrains from killing him because he would be erased from time, and murders J's father out of spite for being thwarted by K.
- Ensemble Dark Horse:
- The Colonel, AKA J's father.
- Griffin likewise was well received, being one of the more charming aliens in the franchise.
- Genius Bonus: Agent W is undercover as Andy Warhol. He begs to be reassigned and K says he'll see what he can do. We never find out if he was ever let go, but Andy Warhol didn't die until 1987, 18 years later.
- The Apollo 11 astronauts pretending not to see aliens is something Apollo 8 was suspected of thanks to the line "please be informed there is a Santa Claus" line when orbiting the Moon.note
- Heartwarming in Hindsight: This exchange from the first movie is both depressing and very sweet in light of the events of this movie. In the first movie, it was a throwaway joke, but here we learn K felt guilty for getting J's father killed and has been watching over him ever since. No wonder he knew J would make a great MIB agent: it was in his blood.J: Did you ever flashy-thing me?
K: No.J: I ain't playing with you, K. Did you ever flashy-thing me?K: No.
- Hilarious in Hindsight:
- Josh Brolins character centers around a plot that involves time traveling to the past in order to prevent a Bad Future caused by an Axe-Crazy Blood Knight. Are we talking about Agent K or Cable?
- Agent K has once attempted to save his past self.
- Wait, so Colonel Chester Phillips was Thanos when he was younger?
- Its also funny that Agent Ks objective in this film is to prevent an alien invasion from occurring on Earth, considering that Brolin would later go on to portray one of the most iconic aliens in comic book history, whose forces invade Earth more than once.
- Not to mention that one of his allies in this film, (The Colonel) is played by Mike Colter. In other words, Luke Cage died Taking the Bullet for Thanos.
- Ho Yay: J steps this up a lot with agent K with J doing married couple style arguing with K in the present and in the 1960's. Plus J's time traveling mission to save K from being killed and erased from existence is just filled with ho yay. Lampshaded at one point by J.
- Moe: Griffin, the human-looking alien who can see the future.
- Narm: The scene where J uses his time machine to learn how to dodge Boris the Animal's spikes via Bullet Time is somewhat undercut by their sudden, and likely unintentional Cooldown Hug.
- One-Scene Wonder: Andy Warhol a.k.a. Agent W (played by Bill Hader) steals the show.
- Surprisingly Improved Sequel: The movie received far better reception than Men in Black II, which was widely seen as a mediocre rehash of the original.
- Ugly Cute: The blue and red baby-like crustacean that Wu was serving to unsuspecting tourists in his restaraunt.
- Uncanny Valley: Aliens in more questionable human disguises will have this effect. The third movie in particular is loaded with these.
YMMV / Men in Black 3