Season 4 of the critically acclaimed drama Boardwalk Empire (it got so good again last season, didn't it?) kicks off with Nucky (Steve Buscemi) making a peace offering to Joe and working with Arnold following his big battle with Gyp. Will Nucky still rule Atlantic City? The new season should explore that burning question.

Meanwhile, Al Capone gets his brothers to help him expand his business to the Chicago suburbs. Sounds good! What could possibly go wrong when Al Capone is involved?

Boardwalk Empire is back on HBO at 9 PM ET. Other shows making their returns tonight include Season 3 of Rachael vs. Guy on the Food Network at 8 PM ET and the Season 3 premiere of Oprah's Lifeclass at 10 PM on, where else, OWN.