Keep Circulating the Tapes - The original 1988 cut of the film (before Feature Films For Families altered it) is exceedingly rare on VHS, only existing on a handful of copies, but was finally released on DVD in 2018.
The Other Darrin: While Peggy's mother is uncredited in both versions, the moralizing cake-baking version of her in the Feature Films for Families version appears to be played by a different actor. The actor who dubs over Mitch's "go to hell" line also appears to be a different actor.
The series
Keep Circulating the Tapes - The only media that made it on the internet is the pilot and a few commercials, it was never rerun on ABC. It did air on TV One in 2007, before never airing anywhere else again.