Don Knotts does not appear in this episode.
This episode is the last to feature Ann Wedgeworth as Lana Shields. The producers ran out of stories for her character and decided to write her off of the show. Ann graciously decided to exit her contract early. Lana would never be mentioned in the show again following this episode and there would be no formal explanation for her exit.
Lana Shields was the only character in the show that did not develop beyond one season. Some people hated the Lana character, some liked her, and some were in the middle. Some say Lana's purpose on the show was to fill the void of the sex starved older broad Mrs. Roper, who left to star in The Roper's series. The producers use the fact that Lana isn't bound by marriage to add something new to it, she really wants young boy Jack. Landlord Mr. Furley, though, wants her. Just as Jack doesn't want her, she doesn't want Mr. Furley! The problem with this set-up was, how long could it have lasted? How long would it be funny to have Jack stay away from Lana and Lana resist Mr. Furley? This leads many to wonder what the rest of the season would have been like if Lana stayed...