In "Identical Problem," twins Helen and Ellen (both played by Diana "Soap" Canova) pretend to be one person, which nearly drives Doc crazy because Helen is warm, Ellen is cold and Doc is feeling amorous. The script was written by David Ketchum and Tony DiMarco and directed by Don Weis. David Hedison is "Julie's old Flame," a guy the pretty cruise director loved until she discovered he was married. Michael Norell wrote the script; Don Weis directed. Ray Bolger and Harriet Nelson are Horace and Henrietta MacDonald, an elderly couple celebrating an anniversary aboard the Pacific Princess in "The Jinx." When Horace reveals that the ship on which they were wed sunk right after the ceremony, the Princess crew is amused. But after a few mishaps involving the MacDonalds, Capt. Stubing and the rest of the crew have reason to be superstitious.