This episode originally aired on May 2, 2011 on Canada's Teletoon.
Scrappy and Flim-Flam's fates are references to the negative reception they received when they were main characters in the 1980's, being blamed for Scooby-Doo's decline, how they were percived by Cartoon Network (which also reflected their unpopularity in their bumpers), Scrappy's evil deeds in the 2002 film, and the fact that they never returned in any more productions because of it.
This is also the first time Flim-Flam has been used since his appearances in the 1980's.
Despite having already met Ed face-to-face once before, the gang show no apparent recognition of him as the associate of Mr. E who spoke to them after theAphrodite case. The only reasonable explaination is they met him at night and would not have been able to have a good look at him.