Man eats a hot dog with an alien in it

After a police chase with an otherworldly being, a New York City cop is recruited as an agent in a top-secret organization established to monitor and police alien activity on Earth: the Men in Black. Agent K and new recruit Agent J find themselves in the middle of a deadly plot by an intergalactic terrorist who has arrived on Earth to assassinate two ambassadors from opposing galaxies.

The stooges are three doctors who graduated medical school by being in it for too many years. They come across such problems as an overly chirpy nurse, a mental patient, and a combination to a safe swallowed by the hospital superintendent in the course of their attempt to get through the day.