"Meet Dave" is the story of a group of tiny explorers from the planet Nil who come to Earth in a robot which looks remarkably like Eddie Murphy. The captain of the ship (also played by Murphy) is on a quest to find an orb sent to Earth to drain its oceans. After spending some time on Earth, the crew (except for one) find they cannot go along with their plan and leave in peace.
Although certainly no blockbuster, it's a good story with many humorous scenes. It's well worth a rent and a watch.