The "Men in Black" are a secret US government agency, who take care of the numerous aliens who, disguised as a man, running around in North America so. Agent Kay (Tommy Lee Jones) is just about his partner Jay (Will Smith, of course, vigorously tearing his mouth shut and may misbehave as a beginner in the ranks of "MiB" plentiful) incorporate, ends up as a galactic cockroach on earth, two other aliens (and incidentally a few people) kills and a galaxy steals. What the earth (ie, to the brink of destruction) brings (once again) to the edge of a galactic war. Jay and Kay stay cool. "Men in Black" is simply fun, although it brings little new in the field of aliens: some look like escaped from sci-fi series of the 70's (but better animated), others like a lapdog. No Matter. If you want to see how a squid-like alien is born: this is the place for it. And Tommy Lee Jones is a wonderful parody of its dry self (or his roles as in "The Fugitive"), for the sole purpose of the film is worth seeing. (This is an Amazon.com at the university-student review.)