Blake Lively

SOME ENCHANTED EVENING - 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 wither her new information. Caroline discovers a side of Klaus no one would have suspected.

Percy (Xander Berkeley) continues his plan to take back Division by threatening to kill Nikita's (Maggie Q) mentor Carla (guest star Erica Gimpel, "Fame"), the woman who took Nikita off the streets when she was a junkie. Determined to get to Carla before Percy, Nikita uses Madeline (guest star Alberta Watson) to send her a message. Percy intercepts the message and it's a race to see who can get to Carla first. Meanwhile, Amanda (Melinda Clarke) tells Alex (Lyndsy Fonseca) it's time for her to take back Zetrov and reveal to the world that Alexandra Udinov is alive.

BLUEBELL PREPARES FOR THE ANNUAL SWEETIE PIE DANCE - Zoe (Rachel Bilson) decides that it's too soon in her relationship with Judson (guest star Wes Brown) to go to the annual Sweetie Pie Dance so instead she makes plans to have a sleepover with Rose (McKaley Miller), whose parents are going out of town. George (Scott Porter) misplaces the save the dates for his upcoming wedding which causes major trouble in Lemon (Jaime King) paradise. Lemon wants her father (Tim Matheson) to finally move on from her mother leaving him, so she secretly gets him a date for the dance.

ANDREA ROTH GUEST STARS - Juliet's (Zoey Deutch) mother Catherine (guest star Andrea Roth) arrives in town, where she proceeds to wreak havoc on Andrew (Ioan Gruffudd) and Bridget's (Sarah Michelle Gellar) relationship. Bridget discovers someone from Siobhan's past and thinks he might be the key to her learning more information about her sister. Meanwhile, Henry (Kristoffer Polaha) discovers a lead that causes Agent Machado (Nestor Carbonell) to think he is closing in on Bridget. Mike Colter also stars. Jerry Levine directed the episode written by Hank Chilton.

PAUL TRANSFORMS THE COURTIER AGENCY / MEGHAN'S MODELING CAREER IS IN JEOPARDY - After drawing a lot of interest at New York Fashion Week, The Network lands rising star Meghan an opportunity to meet with Elle Magazine. But, when JT finds out that Meghan is failing high school, the trip is suddenly in jeopardy. Meanwhile, Paul travels to Phoenix, Arizona, where he visits a new agency looking to join The Network. Do the all-male owners have what it takes to pass Paul's test?

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. Dave Barrett directed the episode written by Roger Grant.

BLAIR STRUGGLES WITH A DECISION ABOUT HER FUTURE - Blair must make a difficult decision about her future, the consequences of which could hurt those she loves most. Serena takes the blame for an incident with Gossip Girl in order to protect someone she loves. Georgina smells the scent of scandal and decides to follow its trail. Penn Badgley, Chace Crawford, Ed Westwick, Kelly Rutherford and Matthew Settle also star. David Warren directed the episode written by Matt Whitney.

CLOWNS, UNICORNS AND SHARKS, OH MY! - Sam is forced to confront a childhood fear when a case takes him and Dean to Kansas to investigate Plucky Pennywhistle's Magical Menagerie, a local pizza chain that hosts children's birthday parties. Sam and Dean discover that the victims' children had recently been to the restaurant and drawn a picture of their worst fear, which then came to life to kill their parent. While Dean confronts the man behind the magic, Sam is left to deal with some very angry clowns. Mike Rohl directed the episode written by Andrew Dabb & Daniel Loflin

TRIAL AND ERROR - In an effort to put her inheritance to good use, Annie volunteers to organize a big charity fundraiser. When Naomi takes drastic measures to land her first event-planning client, her big plan back-fires. Meanwhile, Silver realizes she still has feelings for Navid, and Vanessa (guest star Arielle Kebbel) vows to make Liam a huge star after his agent drops him. Gillian Zinser, Tristan Wilds and Jessica Lowndes also star. Stuart Gillard directed the episode written by Chris Atwood.

NATHAN IS MISSING AND HALEY FEARS THE WORST - As Quinn (Shantel VanSanten) distracts Jamie (Jackson Brundage), Haley (Bethany Joy Galeotti) searches for Nathan (James Lafferty). Clay (Robert Buckley) finally gets answers about his condition. Meanwhile, Julian (Austin Nichols) attempts to get back to a normal life, while Brooke (Sophia Bush) tries to give Tara (guest-star Chelsea Kane "Dancing with the Stars") a chance. Lee Norris, Lisa Goldstein, Stephen Colletti, Tyler Hilton and Paul Johansson also star. The episode was written by Shaina Fewell and directed by Greg Prange