Trivia: At one point, a pile of old video-tapes of the show "Doctor Who" are briefly visible. This is an interesting nod, as throughout the run of "Community", there is a "Doctor Who"-like show entitled "Inspector Spacetime" that is seen or referred to numerous times, while "Doctor Who" was basically never referenced up until this episode. (Presumably for rights reasons.) So evidently, in the "Community" universe, both shows exist and compete with one-another.
Trivia: The scene showing the cafeteria roof collapsing and the subsequent building of support columns to support its weight is actually a bit of a tricky move on the part of the show's creators. Season Six was produced by a different company than the first five seasons, and as a result, all of the sets needed to be rebuilt in a new studio. Unfortunately, the only set big enough for the cafeteria had columns throughout, which weren't present in the original set. They wrote the roof collapse as a way to explain this, and then used it as the basis for an episode - Greendale trying to make sure it can be properly insured in case of emergencies.
Trivia: Series co-star Yvette Nicole Brown originally intended to appear in the sixth season, but had to bow out suddenly after her father fell deathly ill. Nevertheless, she was able to free up just enough time to appear in the opening and closing episodes of the season in cameos.
Trivia: In addition to being the final episode of the show, this is also the only episode to include harsh profanity, with two uses of the "f-word." The first was done as a joke by actor Jim Rash, who surprised the cast by saying the character Abed is "f***ed up" during a take. It was so unexpected and hilarious, they decided to just keep it in, as season six was produced for the internet and thus didn't need to cut around profanity. The second use of the word, by the character Britta, was written into the script, but meant to be bleeped out. However, as they decided to include Rash's adlib of the word, they decided not to bleep Britta's use of the word.