From Vulture:

We’ve confirmed that ["Breaking Bad" star] Esposito will appear in an upcoming episode as a business associate of Pierce’s late father, Cornelius Hawthorne. While the exact reason for his visit is being kept under wraps, we’re going to assume that anyone related to Pierce’s racist dad can’t be a particularly nice guy…Esposito began work on his “Community” episode this week. Just when Esposito’s half-hour will air is unclear, in part because NBC has not yet set a return date for the show.