A woman gets the wrong idea from her husband's secretive behavior and fears that he is plotting to murder her. Isaac begins a whirlwind romance with an internationally known singer. A couple suspects that a painfully boring passenger is actually a wanted jewel thief.

A crotchety old man and a teenage runaway form an unlikely friendship. Julie grows frustrated when an old friend of her brother's repeatedly rejects her advances without explanation. A pair of incompetent painters continually screws up the re-painting of Capt. Stubing's cabin.

A woman who believes her departed dad was a noble sea captain forms an attachment for a devilish old purser; a newlywed couple are prevented by dislocated backs, sunburn and even poison ivy from enjoying their honeymoon; the crew upgrades a couple with modest means to a luxurious suite without consulting Capt. Stubing, forcing the couple to pose as wealthy socialites.

Isaac's possessive mother becomes jealous of her son's lady friend, while he objects to his mom sharing a cabin with her latest boyfriend; a divorced comedy team is too busy making jokes to admit they miss each other; Gopher's budding romance is nearly foiled by a jewel-stealing monkey.

A doctor who had planned on taking the cruise as a vacation cares for Doc when he comes down with the flu. He is initially a difficult patient, but soon begins to fall for his physician. A former dancer who has now opened her own school tries to convince her ex-partner to come to Germany to teach for her. He is reluctant to give up his life with his much younger (and very talented) partner/girlfriend, even though he is putting his health at risk and holding her back from a potentially successful career. A free-spirited woman invites a cab driver along on the cruise after her boyfriend stands her up.