Three's Company (1977)

S4E11 The Love Barge

Title: The Romance Cruise Plot: Jack lands a position on a cruise ship and can bring along a single guest. Faced with the decision between Janet and Chrissy, he’s determined to avoid bringing Lana. To sidestep that, he arranges for Mr. Furley to join the trip with Lana, who is under the impression that Jack will be on board for her. The stage is set for a comical mix of misunderstandings and unexpected twists on the high seas.