Goofs
Japan Cruise: When Worlds Collide/The Captain and the Geisha/The Lottery Winners/The Emperor's Fortune: Part 1
The Love Boat
At the beginning Gopher and Isaac are showing their itinerary using a map of Japan. The land off to the west is labeled China, but that it actually Korea.
Near the beginning, when Harvey Willis (played by Harvey Korman) introduces himself to the mother and daughter, he says, "I'm Harvey Korman," not "Harvey Willis."