The Big Bang Theory Sheldon (Jim Parsons) is suffering from an "earworm" (a song stuck in his head) in this new episode of the smart comedy set in Pasadena. 8 p.m. CBS
The Vampire Diaries Stefan and Damon (Paul Wesley, Ian Somerhalder) spend their holidays seeking Julian in this new episode. 8 p.m. KTLA
Bones The mystery series' mid-season finale combines two new episodes. Emily Deschanel and David Boreanaz star. 8 p.m. Fox
Project Runway: Junior The kids cooking competition offers two new episodes, the second featuring a visit from First Lady Michelle Obama. 8 and...