Although 20-year-old Matt Camden (Barry Watson) had seemed to be on the verge of marriage to his deaf girlfriend, Heather (Andrea Ferrell), at the end of 7th Heaven's fourth season, season five finds the couple calling it quits. Compounding this setback, Matt is forced to move back with his parents (Stephen Collins, Catherine Hicks) when his roomie, John Hamilton (Chaz Lamar Shepherd), takes up housekeeping with his sweetheart (and later wife) Priscilla Carter (Andrea Pearson). Matt's sister Mary (Jessica Biel) continues having trouble adjusting to the pressures of impending adulthood: in short order, Mary drops out of school, quits her job, runs out of money and develops such nasty habits as drinking and petty theft. Like Matt, Mary eventually returns to her parent's home, but the reunion is an uncomfortable one thanks to the omnipresence of her ex-boyfriend Robbie (Adam LaVorgna) -- not to mention her erstwhile beau Wilson (Andrew Keegan). Meanwhile, Matt and Mary's sister, Lucy (Beverley Mitchell), now 16, has become so serious about one of her boyfriends that she ends up proposing to him! Season five ends with a serious rift between Mary and Lucy over the affections of the younger girl's fiancé, Jeremy (David Lago).