WATCH THIS:

  • Winter Olympics (8 p.m., NBC): And so it begins. In an unusual bit of scheduling, action at the Winter Olympics gets rolling a day before the Opening Ceremony in Sochi, Russia. Tonight's slate includes competition in two new events: Team figure skating and slopestyle snowboarding.

  • "The Big Bang Theory" (8 p.m., CBS): It's a "Big Bang" Valentine as Amy (Mayim Bialik) takes nerdy Sheldon (Jim Parsons) to California's wine country for a romantic getaway at a bed-and-breakfast inn. Of course, it's separate rooms and the sexually naive Sheldon is only going along because a train ride is involved.

  • "Tonight Show" (11:34 p.m., NBC): After a 22-year run in which he typically dominated the late-night ratings, Jay Leno says farewell to the "Tonight Show" (again). His final guest was also his first -- Billy Crystal. On Feb. 17, Jimmy Fallon takes over as host.

    Also on Thursday:

  • "The Vampire Diaries" (8 p.m., The CW)

  • "American Idol" (8 p.m., Fox)

  • "Pawn Stars" (9 p.m., History)

  • "The Crazy Ones" (9 p.m., CBS)

  • "Rake" (9 p.m., Fox)

  • "The Spoils of Babylon," miniseries finale (10 p.m., IFC)

  • "Crazy Hearts: Nashville" (10 p.m., A&E)

  • "House Hunters: Where Are They Now?" (10 p.m., HGTV)

    Contact Chuck Barney at Facebook.com/BayAreaNewsGroup.ChuckBarney, or Twitter.com/chuckbarney