The Love Boat S07E14 - The Last Case / Looking for Mr. Wilson / Love on Strike

It is discovered that someone on board is missing, everyone becomes a suspect when a newly retired inspector and his assistant get on the case; after a high school friend of Julie's and her son board, the woman learns an important lesson when he meets her father and another traveler; an engaged couple has to put up with his ex-love who pickets him while they are on board.