The Love Boat S01 E07 Identical Problem/Julie's Old Flame/The Jinx

"You Say You Can't Score on Shore? On This Cruise... You Can't Lose!"

Identical twins pretend to be one person in order to take the cruise on one fare. They leave Doc completely bewildered. Julie gets re-acquainted with an ex-lover, who claims to have broken things off with his wife. After suffering a series of accidents, the crew comes to believe that an elderly couple--which survived the Titanic--is cursed.