When a beloved classmate dies unexpectedly, Britta uses skills from psychology class to counsel the study group. Chang tries to seize more control over campus security.

The residents agonize over their oral boards, reliving every answer they gave during their exams; Arizona's close childhood friend comes to Seattle Grace for medical help; the doctors work on a patient who is missing one third of his skull; and Julia asks Mark to start a family with her. Meanwhile Catherine tells Richard that one of his residents has failed.

Dave welcomes talk show host Stephen Colbert, actress Chloe Grace Moretz, and a performance from the Broadway musical Nice Work If You Can Get It. Stephen Colbert's Super PAC. Chloe Grace Moretz describes her first awkward encounter with "Dark Shadows" co-star Johnny Depp.

An important person in Pawnee dies while Leslie is on a bus tour for the final day of her campaign. Meanwhile Andy investigates a security threat, and Chris finds a cure for his depression.

On Reese's birthday, Finch gives him the day off in hope of keeping him away from the latest person of interest.

After a commercial plane crashes, taking the lives of all onboard, Olivia Pope and her "gladiators-in-suits" must defend the pilot from media and airline accusations; meanwhile, when Amanda Tanner goes missing, Huck calls upon his dark past to find her whereabouts, and Fitz seeks the help of the Vice President in order to pass key legislation despite their icy relationship.

When NASA moves up Howard's mission, he must face his fears and Bernadette's dad, thus putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.

Newt Gingrich suspends his campaign and backs Mitt Romney, Stephen tracks a Super PAC rival, Buzz Aldrin presents a space award, and writer Lena Dunham talks "Girls."

Episode info coming soon ..

The investigation into the death of a surfer reunites Lisbon with her former fiancé. Cho is beginning to question why he's with Summer.

Andy takes a break from flambéing cherries and composing rock operas to jumpstart his Dunder Mifflin comeback. When Robert drunkenly shuts down a nearby branch, Jim and Dwight join forces to outsmart a salesman from Scranton’s uglier sister city.

Klaus acts on his intentions to leave town with Elena, but finds resistance from a surprising new enemy. Bonnie calls on Abby to help her with a difficult spell. As events spiral out of control, Elena is determined to protect Caroline, Damon and Stefan enlist Tyler’s help, while Bonnie and Jeremy take a terrifying risk to make sure her spell is effective. Damon and Stefan have a surprisingly candid conversation about the future.