Welcome Aliens "Invasion of the Saucer Men"

A flying saucer lands in the woods. A teenage couple, while driving to their local lover's lane without the headlights on, accidentally run down one of the saucer's large-headed occupants. They call the police but when they come back they find the man’s dead body instead of the alien. The two guys are arrested while their friends try to find out the truth. And the war begins!