Percy continues his plan to take back Division by threatening to kill Nikita’s mentor Carla, the woman who took Nikita off the streets when she was a junkie. Determined to get to Carla before Percy, Nikita uses Madeline to send her a message. Percy intercepts the message and it’s a race to see who can get to Carla first. Meanwhile, Amanda tells Alex it’s time for her to take back Zetrov and reveal to the world that Alexandra Udinov is alive.
A distraught woman takes the Clinica staff hostage after Michael testifies for a former patient who he believed suffered uncontrollable urges due to a brain tumor.
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.
It's day one of the thirty-day alligator-hunting season in Louisiana. This year prices are higher, and with big bucks on the line, a Gator Gold rush is about to begin. Troy Landry has a plan to cash in reuniting with -year partner Clint and running a second boat with son Jacob at the helm. With tags, more than ever before, he's determined to retain his crown.
In the spirit of Valentine's Day, Meredith and Derek try to have a night to themselves when Lexie offers to watch Zola; Callie hands babysitting duties over to Mark so that she can surprise Arizona with a romantic evening; and Ben proves to Bailey that he knows her better than she thinks. Meanwhile, the ER fills with romantics, including a 10-year-old girl who has an allergic reaction to chocolates from her valentine and a man who is hit by a car while chasing down his frustrated girlfriend.
In honor of the holiday, Faye and Melissa throw a girls only anti-Valentines 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 Devils 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.
When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab.
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.
Elena is surprised to receive an invitation to a formal ball, and when Damon and Stefan hear the party is being hosted at Klauss 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.
It's Sterling's birthday and his mom gives him a super spy car. She tells him to not get it stolen. Looking for his stolen car, he crosses path with the Yakuza.
Dwight scores a special assignment at Sabre's Florida headquarters. As a result, he and Andy must decide which Scranton staffers will join him. Elsewhere, Pam returns from maternity leave.
The Situation secretly gathers information to bring down one of his roommates, and for once it isn't Snooki. JWoww is freaking out because Roger has disappeared and won't return her calls.
Sam finds his estranged sister, Corinne, in jail, heavily medicated and near-catatonic, and brings her to Sheldon for help; Erica begins secret treatments for her cancer and refuses to let Cooper and Charlotte tell Mason; Cooper, Pete and Addison treat the baby of a drug addict; and things between Violet and Scott continue to heat up in the bedroom.
When Ava and Kevin have an epic blow-out, Reagan and Chris find themselves wistful for relationship drama and unintentionally end up creating some of their own.
The eight remaining All Stars compete head to head fin a sportswear challenge for one of the four seasons. Guest judge Cynthia Rowley.
An amateur magician's Jonathan Slavin assistant vanishes during an ambitious disappearing act Leo asks Isabel for help finding Willa.
Jason quits his job and hopes to network at a party hosted by James Franco Tina questions whether she's ready to date Brett Stacey and Eric find themselves in a foursome.
Installing windows using a custom copper pan for flashing; installing architectural shingles.