The Love Boat - Season 2 - Eps 27: Third Wheel/Grandmother's Day/Second String Mom
Gopher gives his parents a cruise as a Mother's Day present. Gopher's father grows jealous of the close relationship between mother and son. An older couple, who has finally seen its youngest child move out of the house, is stunned by an unexpected pregnancy. A widower's teenage daughters repeatedly reject his new wife, but must rely on her help when they get into a jam in Mexico.
About The Love Boat

Title: The Love Boat
First Air Date: 1977-09-24
Last Air Date: 1987-02-27
Status: Ended
Rating: 6.258/10 (from 184 votes)
Language: EN
Seasons: 10
Total Episodes: 251
Network: ABC
Genres: Drama, Comedy
Production Companies: Aaron Spelling Productions
Synopsis
Passengers who search for romantic nights aboard a beautiful ship travelling to tropical or mysterious countries, decide to pass their vacation aboard the "Love Boat", where Gopher, Dr. Bricker, Isaac, Julie, and Captain Stubing try their best to please them, and sometimes help them fall in love. Things are not always so easy, but in the end, love wins.
Cast

Gavin MacLeod
Merril Stubing

Bernie Kopell
Adam Bricker

Ted Lange
Isaac Washington

Lauren Tewes
Julie McCoy

Jill Whelan
Vicki Stubing

Ted McGinley
Ashley Covington Evans

Marion Ross
Emily Stubing