While Betty Garrett had already made her final appearance in Gloria Is Nervous (1975), the phone conversation Edith has with Irene Lorenzo here marks the final time that character is ever mentioned on the show.
In this episode Jack Gilford's character explains a shlemiel and a schlemazel. Coincidentally, just one day after this episode aired, the series premiere of 'Laverne & Shirley' debuted using those words in its opening song. Betty Garrett will join the cast of that show the next season.
The $1000 that Archie wanted to invest in Mr. Bernstein's remote doorbell ringer in 1976 (when this episode first aired) would have the buying power of $4628 in 2020.
Rob Reiner and Sally Struthers are not featured.
Archie mentions to Mr. Bernstein the time when Sammy Davis Jr. sat in his chair, referring to episode 2x21.