The Seavers say sayonara in their seventh and final season in high style by welcoming a new member to the clan -- played by Leonardo DiCaprio! As Mike (Kirk Cameron) prepares to attend teacher's college, Jason (Alan Thicke) suggests that he teach some remedial classes at the local community center. Uneasy goings for Mike turn around, in part thanks to his best and brightest student, Luke Brower (DiCaprio). But Mike discovers that Luke has a secret -- he has no family or home. And so, Luke soon finds himself at home with the Seavers, in Carol's (Tracey Gold) room. Too bad Mike forgot to tell Carol! Meanwhile, Carol has a new old beau, Dwight (Christopher Burgard), Ben has a crush on Sasha Serotsky (Academy Award winner* Hilary Swank), and Chrissy (Ashley Johnson) wants a pony. But big changes are in store, as Washington comes calling for Maggie (Joanna Kerns), and Luke's trucker dad (Gary Grubbs) makes a pit stop at the Seavers'.