for long time viewers, if you remember the episode "The Gang Solves the Gas Crisis", you will cream yourselves at this one
I would also add if you remember "The Gang Runs for Office" or "The Gang Sells Out" or "The Gang Finds a Dumpster Baby" or "America's Next Top Paddy's Billboard Model Contest".. Probably a few others but they're the few i managed to pick up on.
The theme of the episode was "Recycle" i was a bit sceptical when it became clear they meant to recycle things from old episodes, almost like a "jump the shark" episode i thought at first.
But by the end i'd changed my mind, they did it well i thought, some parts had me howling.
Great episode and one which'll have some good re-watch value.