Plot: Agents J (Will Smith) and K (Tommy Lee Jones & Josh Brolin) have been working together for a while, but Boris the Animal (Jemaine Clement) escapes. Boris is a dangerous alien that Agent K arrested on the night of the Apollo moon rocket launch in 1969. Boris travels back in time and killed Agent K before he could arrest Boris. Agent J is the only one who remembers Agent K, and travels back in time himself to fix things. On the way they meet Griffin, who explains about all the alternate futures. Soon, Agent J teams up with the 1969 version of Agent K, and they go after Boris. [imdb link] [photos]
There is not much to chew on though, the satire of the first MIB is gone. This edition digs deeper into the relationship between Agents J and K, and we learn something surprising at the end. It would have been cool to have seen a little foreshadowing of that prior.
Bill Hader has an crazy scene playing Andy Warhol, at a wild party.
Jenny, my DW, hated this movie. She asked why does everyone like MIB3, and hate John Carter -- John Carter was way better. I agree that John Carter was better. Like John Carter, the action scenes are shown at high speed, and you can't really see what is happening. John Carter had more drama. MIB3 is funnier.