Sheldon realizes he won’t live long enough to download his consciousness into a robot body, and attempts to extend his lifespan.

After weeks of concealing the fact she was pregnant and miscarried, Meredith at last tells Derek and is finally cleared to return to her surgical duties in the wake of the hospital shooting spree; Cristina experiences post-traumatic stress disorder in the midst of an operation; and Bailey refuses to let Alex operate until he agrees to have the bullet in his chest removed.

When Jane's shady brother-in-law (Kevin Rankin) comes to town and becomes a suspect in a murder investigation, Jane is forced to help him.

Violet and Cooper make changes to their friendship to appease their significant others; Pete and Cooper argue over a patient's (Justine Bateman) marijuana use; Addison debates going public with her new romance.

Corporate forces Michael into counseling with Toby; Dwight seeks revenge after a shop owner snubs him; Pam tries to change her job title.

The CSI team investigates a shark attack in a casino hotel's pool.

Liz uses her newfound confidence to solve Pete's problem with a difficult editor (Paul Giamatti); Jack tries to cheat mortality; Tracy vows to be present when his wife gives birth.

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

The remains of a couple are found in in a cave; Brennan re-evaluates her relationship with Booth when his girlfriend makes a surprise visit.

Liz faces consequences after Kat discovers she lied; Corey's painful decision leaves Kat heartbroken and tests their friendship.

Jules has trouble coping when Travis gets set to leave for college, Laurie teaches Bobby how to use the internet on his “new” laptop, and Andy hatches an elaborate plan to deceive Ellie with the help of Grayson.

While JJ attempts to reunite a family whose daughter has mysteriously disappeared, her BAU family braces for the loss of one of their own.

When Brittany and the gang try to convince Mr. Schuester to let them do a Britney Spears number, he is reluctant to go that edgy. Meanwhile, an insecure Will is curious about Emma’s new beau, Dr. Carl Howell (guest star Stamos), so he convinces her to bring him in to talk to the kids about dental hygiene.

The second-round results show.

A local football star is murdered; an unpopular groom disappears during a boisterous wedding reception on a boat.

Sam Crow heads north to help Happy with a pharmaceutical favor; Gemma tries to put old family matters to rest.

Alicia has to choose between her marriage to Peter and pursuing a future with Will.

Teams compete in a bake sale, raising money for the pep squad and glee club; guest judge Sylvia Weinstock.

Eight new strangers find themselves right smack in the middle of the "Who Dat Nation," caught up in the reverie of a Super Bowl victory and the never ending party known as Mardi Gras. Caught up in the rebirth of New Orleans, the roommates discover compassion and romance, while igniting a passion for the city's legendary food and music. The diverse group includes an ex-basketball star, a DC State Department worker, a Florida beach beauty, and a Lebanese girl who leaves her tight-knit family for the first time. Living in a gorgeous Southern style home, the roommates' journey is not all parades and fun: a Mississippi party girl is haunted by abuse from a past boyfriend; a hockey player is determined to stay sober after an addiction to painkillers; and a bitter rivalry between two roommates reaches a crisis point and threatens the entire house.

When the body of a wheelchair-user is found in New York Harbor, the man's daughter is charged with his murder.

Robert Lindus is back and wants Hank and Britt to steal a quarter of a million dollars from him.

When thieves target the homes of young celebrities, detectives Winters and Jaruszalski discover that there is more to the crimes than meets the eye; after the perpetrators are discovered, another shocking crime is committed.

Nick works the system to free a single mother accused of running down a jogger; Pete helps a man who is down on his luck.

Lewis asks Marti out on a date; Alice makes an agreement; Savannah asks Dan to dinner at her mother's house.

Benson and Stabler help a repeat rape victim (Jennifer Love Hewitt) stand up to her attacker; the investigation leads Benson to Los Angeles, where she meets a detective (Skeet Ulrich) with information that could help the victim get justice.

Gloria decides to honor her late grandmother by cooking more traditional Colombian meals; Claire finds out Alex is interested in a boy; Mitchell's aversion to public displays of affection causes an argument.

When they go house hunting, Casey's unusual taste in homes concerns Mia; Vicky finds that recently retired Joel is getting on her nerves because he doesn't know what to do with his newfound free time.

A battle erupts over a clue to the hidden immunity idol; a fearless competitor makes a bold move to earn an upper hand.

The contestants pose while riding a roller coaster; Matthew Rolston photographs the models underwater and serves as a guest judge.

Mike and Frankie must decide whether to attend Axl's football game or Sue's first cross-country meet; after raking the yard, Brick wants to set the leaves free in the forest.

Steven and Samantha Bloom, formerly two of the CIA's best spies, are reinstated when a good friend goes missing.

The 16 chefs prepare their signature dishes in the season's first challenge; a contestant is rushed to the emergency room; guests begin to leave when the dinner service is delayed; an elimination.

Dexter must make a choice; Quinn stirs up trouble for Dexter but supports Deb.