The finale of Three's Company has Janet having her wedding in the apartment. Jack Tripper (John Ritter) and flight attendant girlfriend Vicky Bradford (Mary Cadorette) get into a fight caused by her disapproving father James (Robert Mandan). She turns down Jack's marriage proposal due to her parents' troubled divorce. Jack agrees to live together with her in an apartment above the restaurant. The couple is surprised by her dad who bought the building along with the restaurant from Mr. Angelino. Jack hires surfer dude EZ Taylor as his assistant chef. A recurring role is Vicky's mother Claudia (Jessica Walter).
Three's Company presents itself as a young, sexy sitcom but at its core, it's a standard conservative show. The problem with the sequel is that it starts with Jack being the conservative partner. Vicky is doubly a dud. They're like an old married couple despite their living-in-sin situation. That's fine but nothing else is funny. Mandan is a standard sitcom comedic heavy. EZ contributes nothing. No matter how hard John Ritter tries, few of this works. The basic premise is flawed and it gets tired trying to live up to its predecessor's success. The title probably came first and then the premise got assembled after that. I would have put a young teen girl as the third wheel in the apartment. That would be a more direct symmetry to the first show. It would also allow Jack and Vicky be the old couple trying to corral a rebellious teen who would essentially be the new Chrissy. In that case, the dad James would become the Ropers and Mr. Furley and Mr. Angelino combined into one. It's an easier group than this one. The continuing conflict between Jack and Vicky about marriage gets tiresome. Even the theme song sounds tired. Despite being a new show, this is actually running on fumes from its predecessor. As for Janet and Jack doing the new show together, Janet would definitely have more chemistry than Vicky. It's still no guarantee that it would work much better. It's not like the show had a great track record of good spinoffs.