After being blackballed by most of the surgeons, Meredith uses Lexie to spark Derek's interest in her patient's rare brain tumor case and, in secret, gives guidance to April with Bailey's clinical trial; Callie's wish for Arizona and Mark to form a friendship comes to fruition and she realizes it's more irritating than helpful; Alex and Teddy research alternative surgeries for a very superficial patient; and Callie and Cristina struggle with a very difficult spinal surgery.

Episode info coming soon ..

As a hurricane threatens Philadelphia, Mac, Dennis and Charlie go to a mall to buy supplies and check out the large breasted TV reporter broadcasting from there, while Frank and Dee prepare Paddy's, and its basement bunker, for the storm.

Reese and Finch have the added challenge of investigating a Person of Interest who wants nothing to do with their brand of vigilante justice.

Sheldon's mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she also spends time with the rest of the gang, instead of catering to his every demand.

Libyan rebels kill Muammar al-Gaddafi, Tea Party Nation demands a hiring freeze from its members, and Coldplay perform from "Mylo Xyloto."

Episode info coming soon ..

Ruxin hires a hot Au Pair for Baby Geoffrey, and is afraid Taco will sleep with her. Andre explores online dating, and Kevin cheats on Jenny with ESPN fantasy football analyst Matthew Berry.

The CBI team investigates the murder of a woman whose corpse washed up on an island off the coast of California. Rigsby worries that his relationship with a public defender will create awkwardness between him and Van Pelt.

On the first day of their senior year, Elena, Caroline, Bonnie and Matt are still reeling from recent events, while Tyler seems to be enjoying everything a little too much. Damon is annoyed by a new houseguest, and everyone is surprised by the arrival of a new student in Alaric's history class. Matt asks Bonnie for help when he realizes he made a serious mistake. Meanwhile, Stefan continues to carry out his latest assignment from Klaus.