Julie prepares to marry Tony in Sydney and asks Merrill and crew to join her bridal party. Anthropologist Milo and wife Vivian are off to a South Pacific dig where his colleague Deke plans to unveil a find. Julie's successor Yvonne arrives.
Vicki models the bridesmaid's gown she plans to wear for Julie's wedding, while Isaac finds a flaw in the wedding gift that he bought on the crew's behalf.
Julie books Hank to entertain, but he moonlights as a stripper. Isaac tries to set up sad Frank with girls until his ex-wife Jan arrives. Merrill recognizes passenger Jim as a jewel thief and suspects him when a diamond is stolen.
Country singer Annabel meets old friend Martin, a politician traveling with stiff Barbara. Mary meets veteran Jon while sailing with her father Rich. Gopher fantasizes how he'll spend money he found on deck. In "Jackpot," Gopher accidentally finds an enormous amount of money and starts fantasizing about how life will be. He also becomes overly obsessive about the money, including having a wild dream in which he rules the captain (Gavin MacLeod) and crew. In "Country Blues," a famous folk singer meets a man she knew many years ago who is running for high political office. However, his sophisticated companion (Miss Lawrence) dances to another tune when she becomes jealous of the singing star. A father (Mason Adams) can't believe that his about-to-be-divorced daughter (Miss Oakes) is all grown up and hampers her romantic aspirations with a gentleman (Frank Bonner) who is trying to win her affections in "Daddy's Little Girl."
Chef Claude is jealous of new rival Edie Franklin in the galley. Longtime friends Jennifer and Stan reunite. Bumbling PI Kleinschmidt is assigned to protect client Gertrude's jewels.
Earthy Libby Crawford comes between socialite Miss Singleton and her escort Fedalio. Vicki meets Todd Andrews, who is traveling alone. Psychic researchers Julian and Kate Garfield search for a ghost.
The crew is in Australia to work on one of the cruise line's ships based there. And a wealthy man named Farnsworth (Lloyd Bridges) has decided to invite his whole family for a reunion, but in actuality he wants to see who, among them he should keep in his will.
Tony and Rose Vitelli plan to renew wedding vows. Sisters Agnes and Gladys travel together and Agnes bonds with passenger Henry. A tooth filling and rival passenger Brandon interfere with Isaac's romance with Patty.
Adam's brother Fred has resentment toward him. Stowaways Zeke and Zelda commit fraud and start charging items, not knowing that crew members have to pay for them. Emily Parker meets Michael Scott, the author of the book she's reading.
Vicki feels unneeded and the crew goes overboard giving her work to do on board. Three bridge players get miffed when their fourth, Shirley, meets dentist Frank. Cold Linda rejects men, so Barry tries to win her over by faking celibacy.
Adam introduces his fifth wife Tania to the crew. Safety inspector Sid takes his job too seriously and sees danger everywhere. Financial group president Ralph tries to talk VP Lydia out of quitting due to bogus rumors about their affair.
The nearness of their homes interferes with Don and Doris' romance. Artist Barbara wants to paint Merrill's portrait - nude. Elderly Frank vaguely recognizes honeymooning Stan from somewhere but can't recall details.
Concert pianist Paul retired due to arthritis, but fans pester him to play. Gopher is shocked to find out where he met Rachel. David feigned insanity to get a pension and psych Lisa must prove he's faking.
Doc and Isaac hear news about Merrill's old flame Linda. Businessman George uses his secretary's love to cover his dirty tricks. To catch a woman's attention, Doug reports being sexually attacked by a woman.
Howard travels with secretary Doris, meets Cindy, and pushes Doris to quit so he can hire Cindy. Wilfred offers the crew $10K to find him a wife. How does Abigail tell childhood love Jim that she wears a brace due to spinal problems?
The crew stages a musical revue, with Gopher and Isaac scripting and relatives expecting to star. Lionel wants Millie Washington to marry her. Gopher argues with Doc over his former sister-in-law Trish, and with Isaac over their script.
Lionel promises to give Isaac an executive position, if Millie marries him. Doc's in-laws help him make up with Gopher. A stranger paid for Victor's passage. The crew's relatives squabble over who's going to star in the musical.
A competition pits Merrill, his rival Gunner, and their crews against each other and reignites a rivalry. Divorcing Harry and Dot take separate vacations. Dr. Skip and Megan need a guinea pig to try out an aphrodisiac.
Ellen and Jesse annoy each other. It turns out that Gunner rigged the games, so Merrill becomes as tough as Gunner is, upsets Vicki, and drives the crew relentlessly to physical exhaustion.
Nurse Charlene gives company physicals and Isaac fears for his job. Debbie brings mom Millicent to meet boyfriend Ted. Julie's cousin Carter wants to dump his fiancee Muffy for being "very nice".
A publisher (Jared Martin), trying to sign up a famous author (Alan Hale Jr.), becomes involved with the author's niece (Georgia Engel); two passengers (Joanna Pettet and Paul Williams) hunt for treasure; Vicki's friend (Rad Daly) comes aboard.
April is a Spanish tutor to school headmaster Brad York. Lonely Grace Bostwick plans to jump overboard but white-clad Gabriel claims to be a guardian angel. Newly divorced George and Gwen Finley land in the infirmary together.
One dress affects three people. Model Donna is to wear it to display her diet success. Poor flower vendor Rose's daughter Carol thinks her mom is rich. Norman dodges his ex-wife Nancy's homicidal father Tom.
Divorced Marian reunites with her son Danny, who reads her diary and avoids her. Gopher and Isaac think Lola is trying to kill husband Orville to inherit his money. Bert is taken with Marla and pretends to be her pen pal.
