NGTV Guide: Thursday, February 9

30 Rock – NBC 8/7c – SPECIAL ONE HOUR EPISODE
“Hey Baby, What’s Wrong?” – Criss and Liz decide to celebrate Valentine’s Day, but they need to buy a dining room table first. Jack entertains his mother-in-law, Diana (Mary Steenburgen), as Jenna frantically looks to Pete to fill in last-minute as the producer of her first live performance on “America’s Kidz Got Singing.” Back at the office, Tracy and Frank try to help Lutz find someone to spend Valentine’s with.

The Vampire Diaries – the CW 8/7c
“Dangerous Liaisons” – Elena is surprised to receive an invitation to a formal ball, and when Damon and Stefan hear the party is being hosted at Klaus’s newly renovated mansion, they both insist on attending the event with her. Caroline and Matt also receive invitations to the ball from unexpected admirers. At the elegant party, Elena learns of a horrifying plan that could lead to numerous deaths and she must decide who she can trust with her new information. Caroline discovers a side of Klaus no one would have suspected. Finally, after an evening of violence and dashed hopes, Damon finds a new way to cope.

The Finder – FOX 9/8c
“The Great Escape” – Amateur magician Preston Miller (guest star Jonathan Slavin) seeks Walter’s help to find his assistant who vanished after a failed attempt at an ambitious disappearing act. With the help of Special Agent Judy Green (guest star Ever Carradine), Walter and Leo find clues that lead them to uncover a counterfeit money ring. Meanwhile, Leo enlists Isabel’s help in looking after Willa.

Person of Interest – CBS 9/8c
“Wolf and Cub” – The Machine identifies Darren, a teenager whose brother was just murdered, as the next POI. Meanwhile, Finch is growing concerned that the son of his former business partner is dangerously close to finding out about The Machine.

The Secret Circle – the CW 9/8c
“Valentine” – In honor of the holiday, Faye and Melissa throw a girls only anti-Valentine’s Day slumber party for themselves and fellow witches Diana and Cassie. But the night gets wilder than expected when Melissa offers Diana some mood altering “Devil’s Spirit” and the first person Diana loosens up around is Lee, who crashes the party to help Faye achieve her own power. Meanwhile, Cassie is forced to turn to Adam and Jake after she becomes haunted by the spirits of some vengeful witches.

Up All Night – NBC 9:30/8:30c
“Day After Valentine’s Day” – When Ava (Maya Rudolph) and Kevin (guest star Jason Lee) have an epic blow-out, Reagan (Christina Applegate) and Chris (Will Arnett) find themselves wistful for relationship drama and unintentionally end up creating some of their own.

The Mentalist – CBS 10/9c
“At First Blush” – While a jury deliberates the guilt or innocence of a defendant on trial for murder, Jane tries to prove she has been wrongfully accused before time runs out. Meanwhile, Summer may have gone too far when she helps Cho make a case against a suspect.