"My Son, the Genie" guest stars Gilligan himself, Bob Denver, in the one time only role of novice genie Harold, required to spend one day with an old genie to earn his stripes. Since he's the eldest son of Haji, king of all the genies, Tony and Jeannie must tread carefully in teaching him how to work his magic. Meanwhile, Dr. Bellows reveals that Major Nelson has been chosen to welcome the President of the United States at his home for dinner. One genie is tough enough, but two turn out to be even more nerve wracking, but whether sweeping up or tossing the salad Harold can't seem to get anything right (he always wanted to be a chariot driver!). The recent cancellation of GILLIGAN'S ISLAND meant that Bob Denver was now searching for new opportunities and hadn't lost his slapstick acumen. The only script delivered by Bill Richmond, fresh off several projects with Jerry Lewis, so this was his forte; in fact, Lewis himself was supposed to play Harold!