Diff'rent Strokes
Famous '80s sitcom starring Gary Coleman as Arnold and some other guy as Willis. All of its three former stars (save for the guy who played Mr. Drummond) have been involved in some controversy: Gary Coleman punched some woman in a parking lot, and Willis became addicted to drugs, but overcame his addiction. Dana Plato, however, succumbed to her addiction.
Deiff'rent Strokes isn't on much anymore.