The last episode of the series. The show had been renewed for a fourth season until the previously-cancelled Gunsmoke (1955) was reinstated with the sacrifice of this series and what was to be a brand-new show.
Mr. Howell says that the Skipper and the Professor are "no Maxene and Laverne." He is referencing The Andrew Sisters, a popular singing group. This means that Mr. Howell would be "Patricia" (Aka Patty).
Despite being the last episode aired, this episode was actually the second produced and filmed in June/July 1966 almost 10 months prior.
Mrs. Howell says, "I wonder if he (King Kalawani) knows Grace and Prince Rainier." She is alluding to Grace Kelly, the famous actress who gave up her film career in 1956 to become Princess Grace of Monaco.
This is the only episode in which all four male castaways are dressed as women.