A high profile chef is found frozen to death in the kitchen of a hot New York restaurant. Complications ensue when Castle and the restaurant owner, an old high school girlfriend of Beckett's, share an attraction. Meanwhile, Beckett's relationship with Det. Demming continues to grow.

NBC webisode. Abed and Starburns present their video assignment to the Spanish class.

NBC webisode. After a second chance and a new executive producer attached, Abed and Starburns present their video assignment to the Spanish class... again.

Actor Mickey Rourke (Iron Man 2); actor Jim Parsons (The Big Bang Theory); eliminated ``American Idol'' contestant Siobhan Magnus.

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

Tonight Stephen welcomes Harvard law professor Elizabeth Warren. Also, Stephen talks with the president of the Salt Institute Lori Roman and the executive director of the Center for Science in the Public Interest Michael Jacobson about salt intake regulation.

Tonight's guests are actor Morgan Freeman and actress Kate Mara.