On TV tonight
SEASON PREMIERE The X Factor, 8 p.m., Fox Kelly Rowland and Paulina Rubio join Simon Cowell and Demi Lovato on the judging panel this season. Also, Mario Lopez hosts all by himself, because he's a big boy!
The Presidents' Gatekeepers, 9 p.m., Discovery All 20 living White House chiefs of staff take four hours over two nights to talk about how important they are. Or were. Well, some of them still are.
SEASON FINALE MasterChef, 9 p.m., Fox The fourth winner of this competition is crowned, getting cash and a cookbook deal. How hard can a cookbook deal be if Winnie the Pooh can publish one?
SEASON FINALE Royal Pains, 9 p.m., USA A young paleontologist prepares a dinosaur skeleton for auction. Hank doesn't have the heart to tell her there never was a triceratops.
— Joshua Gillin [email protected]