An advice columnist neglects her husband to devote all her time to her fans, prompting him to seek affection elsewhere. A man with a negative history with Capt. Stubing fills in for the ailing chef. A frequent passenger, who is depressed about his impending divorce, winds up on the same cruise as his pregnant wife (who has failed to tell him about the baby). They somehow keep narrowly missing each other.

In a Christmas-themed cruise, the captain worries about how to effectively lead his ship but be a friend to his crew as well. A married couple who outwardly appear happy and in love are both desperate for the other person to give them a divorce - and they go to extreme measures to get it. An embittered ex-con boards the ship for a holiday with his wife but also with revenge on his mind for the person who framed him for the crime. A priest brings a group of orphans aboard for the cruise.

(Part 1) The Love Boat sets sail with two famous Hollywood stars, married couple Roz Rogers and Bill Klieg who need to find a balance between their professional and personal lives. An inept team of thieves board the ship and try numerous tactics to steal the Star of Kashmir, an expensive jewel brought aboard the ship by Ms. Rogers. Two childhood friends from a school for the blind meet up on the ship - only one of them isn't blind anymore. But that's not the only secret he is keeping from his friend. A philandering husband looks like he will be found out when he boards the ship with both his wife and his mistress.

(Part 2) The Love Boat sets sail with two famous Hollywood stars, married couple Roz Rogers and Bill Klieg who need to find a balance between their professional and personal lives. An inept team of thieves board the ship and try numerous tactics to steal the Star of Kashmir, an expensive jewel brought aboard the ship by Ms. Rogers. Two childhood friends from a school for the blind meet up on the ship - only one of them isn't blind anymore. But that's not the only secret he is keeping from his friend. A philandering husband looks like he will be found out when he boards the ship with both his wife and his mistress.

A young bachelor must marry within the week in order to claim a $3 million inheritance; a drab widow poses as a glamorous adventuress and captures the heart of the Captain; a confirmed male chauvinist angers his fiancee, who finds comfort in sick bay with Doc; a scandal sheet reporter sets out to compile material for a sins-at-sea story.

A young female passenger encourages Gopher to be his own person and stand up for himself to Captain Stubing. However, neither were expecting the consequences of their actions. A cheating husband is caught when his neighbors from home also board the cruise. However, being holed up in a cabin with his mistress isn't all that he hoped it would be. A businessman uses all his wiles to convince a grieving widow to sell her husband's business to a Japanese conglomerate. But he soon comes to realize that this may not be the best idea.

Julie's parents arrive on board the Pacific Princess and announce their plans to divorce; an author of morally uplifting pamphlets and a prim censor fall in love while sharing a cabin; a young girl's tomboy image falters after she receives her first kiss.

A man makes a move on three women; not knowing that they are travelling companions. Captain Stubbing's god son is taking a cruise with his wife, whom he married two years ago but his military duty kept him away. And two brothers who stage false injuries, so that they can sue the insurance company, have targeted the cruise line.

Captain Stubing's Uncle Cyrus uses every trick in his devious mind to get Julie alone, until her ""Aunt Phoebe"" intervenes; a desperate businessman uses his daughter as bait to close a deal; the neglected wife of a publisher romances a novelist, hoping it will give him the inspiration for the final chapter of his book.

A shy young man becomes a completely different person at night; a businessman who doesn't have time for his family learns a valuable lesson; a man who believes his chances of survival are better at sea than as a witness in a gangland trial receives loving sympathy from a fellow passenger.

A ghost experiences jealousy as his mission to find his wife a new husband appears to be succeeding; overprotective Gopher mistakenly entrusts his kid sister to Doc to stave off the ship's wolves, not realizing that she's all grown up; a long-divorced couple is accidentally trapped in an isolated cabin.

A beauty can't choose between Captain Stubing and Doc; a man and his wife return to the ship with an orphaned boy; a hospital executive falls for a seemingly successful businessman.

Gopher quits his job to manage a new hotel; a wealthy eccentric widow books a five-year passage and begins meddling in the crew members' lives; a magician tries to avoid his assistant by sending his brother to perform in his place.

A father takes too much of a liking to his son's new girlfriend; a bachelor is terrified at the idea of marrying his gung-ho girlfriend; the crew gives a troubled teen a chance at rehabilitation.

A professor studies the causes of sexual stimulation, but doesn't realize that his test subject is in love with him. A woman tries to help her ex-football star husband move on after he gets cut by his team. Gopher accidentally aggravates the man with his comments. A woman books the honeymoon suite and schedules a reception, despite the fact that she isn't seeing anyone. She hopes that she can find a husband before her 40th birthday in a few days. Julie tries to talk her out of the wedding, and teach her that her self-worth shouldn't be based on her marital status.

A friend of Capt. Stubing's runs into his long-lost old flame, who has since become a nun. He professes his love for her, forcing her to make a difficult decision about her future. A woman pursues a shy astronomer, mistakenly believing that he is the renowned sex therapist/author who is travelling incognito on the ship. A young woman's pushy mother constantly nags her to find a wealthy husband. Gopher tries to cheer the woman by asking her to dance and giving her what he thinks is a cheap toy ring, unaware that it is actually a passenger's lost engagement ring.

Capt. Stubing decides to get Vicki a parrot for Christmas. Unfortunately, it hasn't been trained to talk, and Gopher and Isaac's efforts to train it prove disastrous. A stowaway convinces the crew that a playboy passenger is his father. A father and son, who haven't spoken for ten years since the younger man left their singing act to go solo, resist their wives' efforts to reunite them.