A man organizes a ""marriage-a-thon"" cruise, with special prizes to be given to the couple found to be the most compatible. At the same time, he tries to save his own crumbling marriage. Doc tricks Gopher into taking his place as one of the judges, but comes to regret it when the two attractive female judges constantly try to make time with Gopher. The single parents of one of the engaged couples come aboard with the hopes of breaking up their kids, who they think are too young to be tying the knot. A couple tries to finally get married after ten years together--and nine broken engagements. A groom decides to dump his fiancée, but skips the cruise and leaves his best man to break the news to the bride. The best man is Marv, the young man who befriended Julie when he was best man for another wedding on the Alaska cruise. He cannot bring himself to tell the bride the truth, particularly because he also has feelings for her.

Vicki tries to play matchmaker for Capt. Stubing and Emily, whose husband still plans on winning her back. Gopher lands in a Curacao jail after Doc sends him on a wild goose chase so that he can get cozy with the marriage-a-thon judges. Carl and Mary Ann decide that they were wrong to interfere with their kids' wedding plans; but their new romance drives a wedge between the couple. Mary considers calling it quits with Tom, who is physically unable to say the words ""I do"" because of his subconscious fears about marriage. Emily accuses Marv of treachery after her fiancé suddenly reappears in Curacao and denies that he planned to leave her.