The Love Boat (1977)

S7E15 Last Case/Looking for Mr. Wilson/Love on Strike

Detective Manfred teams up with his secretary, Lil, to look into the mystery of a missing passenger. Meanwhile, Jan and her son Rich come together with her father, Colonel Maddox, who is eager to meet his son-in-law. Additionally, Jenny voices her objections to her ex-boyfriend Don's upcoming marriage to Millie.