NPR's guide to the running gags from the show.
A song exploring racial themes recorded by G.O.B. and Franklin.
4 episodes feature this joke:
"It Ain't Easy ..." is played during the building montage.
Sources: Joke data compiled by Adam Cole / NPR. Episode metadata from The TVDB via a Creative Commons Attribution 3.0 United States (CC BY 3.0 US) license.