The CSI team is shocked and saddened when, after working with Dr. Raymond Langston on the 'Dick & Jane' murders, Grissom announces that his time as a CSI has come to an end and offers Langston a permanent position on the CSI team.

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.

Kyra Sedgwick; and Gwen Ifill. PLUS: Great Moments in Presidential Speeches; George W. Bush cleaning his glasses; Inauguration Day Plans; filling in for Osama bin Laden; and Chris Elliott and Gerard Mulligan drop in uninvited.

Dad, Mom, two kids and a dog. An all-American family doesn't stand a ghost of a chance against the bloodthirsty force that turns their new home-sweet-home into a haunted house.

A look back on President Bush's relationship with the media -- Stephen wonders if tonight's the night they finally do it and Shepard Fairey's "Hope" poster belongs to everyone.

Episode info coming soon ..

The office is on eggshells because Andy still hasn't found out about fiancee Angela's affair with Dwight. When Michael spills the beans, Dwight and Andy take matters into their own hands. Meanwhile, Michael is nervous about being called down to corporate for a meeting with Wallace.