Josh Brolin should be given some sort of award for what looks like actual metamorphosis into a young Tommy Lee Jones.
MIB III sees K apparently killed in the sixties which leads J having to travel back in time to save him and reveal a secret that the universe itself has been trying to hide. Nice.
It also stars Alice Eve and Emma Thompson. Quite what Miss Thompson is doing in this film is beyond me. A very incongruous choice of casting as I don't really think she has a funny bone at all.