Three's Company (1977) : 8x22

When Jack proposes to Vicky, she turns him down cold. The reason is that she's afraid of marriage because it might fail like her father's did. They decide to live together. The trio finally moves out of their apartment and into their new lives: Terri is going to Hawaii to work with poor children, Janet and Philip move into their new place, and Jack moves into the apartment above the restaurant with Vicky. As they begin their new life together, Mr. Bradford comes in and tells him that he is the new landlord! With that, the spin-off series Three's a Crowd begins.