Plot

Identical twins share a ticket and confuse Doc. Julie's old heartthrob is on the cruise alone but no longer married. And an old couple who honeymooned on the Titanic are thought to be a jinx as strange things happen to crew members.

Identical twins Ellen and Helen Edwards (played by Diana Canova) have only one ticket so they've planned it out, courtesy of an alarm wrist watch, that only one of them is out of the room. This causes confounding and perplexing situations for Doc (Bernie Kopell) as Helen comes on to him, while her twin Ellen spurns him, creating some hilarious scenes. Julie's (Lauren Tewes) old heartthrob (David Hedison) is on the cruise by himself and as charming as she remembered but he was married at the time. And a delightful old couple (Ray Bolger and Harriet Nelson Nelson), who were married and survived their cruise on the Titanic, are thought to be a jinx, according to the old wive's tale as told by Gopher (Fred Grandy), as strange things begin to happen to crew members one by one.—lemoviecritic

THE IDENTICAL PROBLEM - Ellen Edwards is on the cruise for a vacation, but her sister Helen Edwards wants to find a husband. Helen is enchanted by Doc while Ellen rejects him. And since they're twins, Doc becomes quite confused. JULIE'S OLD FLAME - Julie's old flame Buddy Stanfield is onboard, causing emotional pain for her. THE JINX - Horris and Henrietta McDonald survived the sinking of the Titanic decades ago. Now, they're on their first cruise since that fateful night and causing a jinx, because mysterious accidents begin happening to the crew members.