Crew members learn that Captain Stubing is under consideration to take over a prestigious cruise ship and go overboard to help their captain make an outstanding impression; a woman unknowingly makes a date with a friend's fiance; a disabled surgeon belittles Doc for practicing aboard a cruise ship until Doc makes a surprising diagnosis. GUEST STARS: Hans Conried, Ben Murphy, Donna Pescow, Carol Lynley, Richard Anderson, Diana Muldaur

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One-time stowaway April Lopez returns to the ship as a popular singer. However, she grows tired of the hassles of fame and decides that she would like to become a cruise director. Julie tries to show her the ropes, but April ends up creating havoc wherever she goes. A couple brings its four rambunctious children along on its second honeymoon. The woman repeatedly ignores her husband to tend to the children's needs, and April inadvertently creates further problems with their marriage. A buddy of Capt. Stubing's from his military days comes aboard, and is shocked to see the former USO star with whom he once had a romance. Due to a misunderstanding, each believes the other is to blame for cutting off their affair.

The crew plans a surprise birthday party for Julie. Isaac, Gopher and Doc try to keep her from getting suspicious by claiming that all of their secretive conversations are part of the ""Brotherhood of the Sea,"" a clandestine organization that only accepts men. This infuriates Julie, who becomes determined to break down the gender barrier at any cost. She winds up ignoring a potential suitor while the guys try to distract her by putting her through an ""initiation"" process. A philandering man relies on his awkward but sweet assistant to keep his various girlfriends from learning about his activities. A young gymnast grows tired of the pressure placed on her by her overbearing father, who is determined to mold her into an Olympic champion. A lonely rich boy, travelling on the cruise alone, tries to encourage her to have some fun.

April returns to the ship with her fiancé, a former used car salesman turned manager whom she has known only a few weeks. The crew is certain that the man is scamming her. A couple comes aboard the ship to finish a script before filing for divorce. A man is shocked to run into the daughter he gave up for adoption and her adoptive mother. He agonizes over whether to tell her the truth about her parentage.

Vicki develops a crush on a popular singer, but soon has her heart broken when she misinterprets his kindness as something more. Two extremely clumsy people, who have recently been involved in an auto accident, alternately bicker and romance each other--while everyone else tries to stay out of their way. A man is afraid to become involved with a woman because the court recently forced him to give up a large portion of his income to his last girlfriend. His lawyer tells him that he cannot sleep with any woman unless he first gets her to sign a waiver.

Isaac is nervous about the arrival of a famous model, who was his classmate in the first grade. The woman tries to use Isaac to make her sports-obsessed husband jealous. Two sisters overhear Janet pretending to fend off an attack by Isaac, and come to believe that a sex maniac is loose on the ship. Two attorneys must keep their affair a secret because they work for the same firm. He wants to make the relationship public and get married, but she experiences doubts. An older woman undergoes a drastic makeover to shake out of her humdrum life, and encourages her skeptical husband to do the same.