The Love Boat (1977) : 3x13

Doc suspects that a friend's boyfriend is still playing the field. When she tries to prove him wrong by suggesting a quickie wedding, the man claims to have contracted a terminal illness. Capt. Stubing hopes for another chance at love with his recently divorced ex-flame, Eleanor, but she takes an interest in someone else. The captain assigns Gopher to keep an eye on two teenagers who are posing as newlyweds and shacking up in the honeymoon suite, as one of them is the daughter of the Executive Vice President of the cruise line.