One episode featured staff writer, Chris Langham, (who wrote some episodes of this show, starting in series 3) guest starring due to Richard Pryor being unable to make the taping of the episode at the last minute.
An early tradition was to present the guest star with a Muppet likeness of themselves as a parting gift at the end of the show, but this only lasted for the first two episodes produced, featuring Connie Stevens and Juliet Prowse.