I watched Flowers for Charlie last night. my god, I forgot how good that was. Charlie is given a pill to make him smarter, only it was basically a sugar pill, but that didn't stop Charlie from believing he was getting smarter.
Mac & Dennis: Manhunters - (Frank convinces Dee & Charlie they've eaten human meat, and Mac & Dennis 'hunt' Cricket)
I forget the episode name, but the episode where they put hidden cameras in Charlie's Mom's house to monitor her safety with Mac's Mom; then they turn it into a sitcom by adding sound effects and laugh tracks.
and yeah, the evolution of Dennis is great. an absolute psychopath lol.