The name that Jennifer uses when she goes undercover on the boat, Zofya Federkiewicz, is Stefanie Powers' real middle and last names.
Several sets were borrowed from the TV series "The Love Boat (just put some stickers on the walls and doors). E.g. the end sequence, where the villainous captain is tossed overboard by Jonathan after the usual small fighting act, takes place in the area where "the Love Boat" travelers usually took their breakfasts.
Even though it is obviously the Love Boat set, a long shot of the ship shows a ship with the stack markings of Carnival Cruises.
Jennifer's pickpocket alias "Mona" is the same name as her character in the Fortune City episode of "It Takes a Thief." That was the first time she worked with Robert Wagner.