Last time Chrissy Snow's character and name is mentioned or seen again in affiliation with the show since Season 5 episode 17 & 18 - a bittersweet two part episode considering it was a tribute
Lucille Ball would host a retrospective special for Threes Company. (The Best of Three's Company, Part 1 and 2) This would be the second time Lucy would appear with Don Knotts; he also appeared on "Here's Lucy" a few years before this.
Anne Wedgeworth, who played Lana Shields in the first 9 episodes of season 4 was not mentioned in this two part episode.
Second of the last two episodes to feature Suzanne Somers, Norman Fell, and Audra Lindley in the opening credits, and the second and last episode where Fell, Lindley, and Don Knotts are mentioned together in those opening credits.