Derek's mother, Carolyn, makes a surprise visit to Seattle and meets Meredith for the first time, as Mark tries to conceal his relationship with Lexie from her as well; meanwhile, death row inmate William wishes to donate his organs to Bailey and Arizona's patient, as Owen and Cristina try to go on their first date.

Joy steals Randy's audition for Erik Estrada's reality show "Estrada or Nada", but her public appearance has consequences for Darnell.

Three superheroes from the future travel to the past and join Clark in hopes that together they can defeat Brainiac, who has taken over Chloe's body.

When a dirty cop the team has been trailing for months shows up dead the cold trail of Warrick's killer gets hot again, and this time the CSIs won't rest until his killer is put to justice.

After Michael spills the beans about Angela's affair with Dwight, Andy and Dwight deal with the matter on their own. Michael is nervous about meeting at corporate with David Wallace.

When the ghost of a young woman haunts an abandoned house, Sam and Dean investigate. However, the situation gets complicated when a family moves in and ignores the brothers' warnings.

Addison is attracted to Wyatt, the rival practice's brash doctor, while Violet secretly dates Pete and Sheldon at the same time, and Cooper gets closer to Charlotte in a family emergency.

Gordon Ramsay heads to La Grange, Illinois, to help turn around a French-American eatery called Cafe 36. They need Gordon's help in teaching them what to do, how to control the head chef, and how to bring customers in.

When a flu outbreak hits the TGS staff, Jack has to decide who will get a vaccination and who won't.

Neela has recurring dreams about trying to save a girl with sickle cell anemia. In them she also goes to an attending interview and sees an old colleague, has conversations with Ray, welcomes Brenner back from Australia, and assists Gates and Banfield in trying to save a "dream runner" who jumped out of a window during his sleep.

A quiet community in Texas all of a sudden becomes violent. When Hood goes to investigate he starts displaying the same psychotic behavior.

FBI Agents, and new partners, Charles Barker and Ellis Dove must go undercover to put an end to an illegal weapons ring.

The search begins for the The Merchant Royal.

Contributing editor for "Vanity Fair" Bethany McLean.

Tonight Stephen welcomes the host of Meet the Press, David Gregory.

This episode's theme is Fight or Flight. Panelists Alan Davies, Sean Lock, Johnny Vegas and newcomer Pam Ayres answer questions about spitfires, fish, and fighting animals.

The anarchic, award-winning pop quiz with host Simon Amstell, regular team captain Phill Jupitus, and special guest team captain Russell Brand. Guests include Rachel Stevens, Sway and Hugh Fearnley-Whittingstall.