|What's missing, Scoobypedia?|
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Cast and characters
|Don Messick|| Scooby-Doo|
|Casey Kasem||Shaggy Rogers|
|Frank Welker||Fred Jones|
|Heather North||Daphne Blake|
|Nicole Jaffe||Velma Dinkley|
|John Stephenson|| The Great Mysto|
|Joan Gerber||Madame Zokar|
|Actor||Magic Mansion Phantoms|
|Actor||Phyllis Diller's neighbor|
|Phyllis Diller's poodle|
|Lucas||Strange manner. Took an interest on Phyllis Diller's jewels.|
|The Great Mysto||Acted suspiciously. Also took an interest on Phyllis Diller's jewels.|
|Alberto||Suspicous manner. Also took an interest on Phyllis Diller's jewels.|
|Madame Zokar||Supposedly called out the spirit of Phyllis Diller's first husband which revealed the location of her jewels.|
|Alberto and his acccomplice as the Magic Mansion Phantoms||To steal Phyllis Diller's jewels.|
- Phyllis Diller was actually married two times to Sherwood Diller (m. 1939-1965), and Warde Donovan (m. 1965-1975). She was married to her second husband when she appeared in this episode.
- Phyllis Diller passed away on August 20, 2012 making her one of ten guest stars who is no longer living (as of 2014).
Animation mistakes and/or technical glitches
- None known.
Inconsistencies/continuity errors and/or goofs/oddities
- It was never revealed who the Gargoyle was.
- Due to most likely expensive royalties owed to Phyllis Diller (her estate as of 2012) in lending her likeness and voice to a fictionalised version of herself, Warner Home Video are unable to release this episode onto DVD.
Guess Who's Knott Coming to Dinner
Sandy Duncan's Jekyll and Hyde