the invader be a fast moving sci fi thriller star ben cross and sean young . ben play renn and a traveller from another galaxy try to find annie ( play by sean ) who be physically ideal to have his child . this child and if allow to be bear and return to his planet and may be the only chance for his race to survive . the enemy and an alien who have destroy renns people and have also follow renn across the star to stop this birth . cross again show great range from comical beginning a the alien enter a local bar and order his first earthling cocktail and to his race with the enemy and the drama of whether he can keep annie and the child she be carry alive .