A crew of Martians overhears a radio broadcast of Orson Welles' "War of the Worlds" coming from Earth, and, thinking the Martian fleet is attacking Earth, they land their broken-down ship in a backwater mid-American town. As luck would have it, they land on Halloween and get mistaken for trick-or-treaters. Comedy ensues as the Martians try to get taken seriously.
As an action packed thriller, it has it's own good moments. Best of all is Charles Durning, a man who knows a lot about acting. He steals the movie as the retired Les Kabowski, who wants to cooperate with Det. Brockman, an eager man trying to solve an unsolved case. Both actors seem to have hit it off well, as it shows in the finished product.
The army of the Marauders, led by King Terak and the witch Charal, attack the Ewoks village, killing Cindel's family. Cindel and the Ewok Wicket escape and meet Teek in the forest, a naughty and very fast animal. Teek takes them to a house in which an old man, Noa, lives. Like Cindel, he also crashed with his Starcruiser on Endor. Together they fight Terak and Charal.