After several victims are found dead while performing normal, everyday activities, the CSIs must find the reason as to why each of the victims remain upright after dying.

Bailey heads up a "domino procedure" in which each surgery hinges on the one preceding it. Meanwhile, Derek gets sole credit for the brain-tumor study he did with Meredith; Lexie tries to get George to notice her romantically; and Sloan counsels a desperate Callie in the ways of love.

After discovering Dennis' erotic memoir, Mac and Frank attempt to make some money off of it. Meanwhile, Dee and Charlie decide to spend a day in each other's shoes.

Hell beckons again when Dean is stricken with a mysterious illness that frightens its sufferers to death. Sam and Dean scramble to find the cause of the disease in time to save Dean from sure death.

Episode info coming soon ..

Episode info coming soon ..

Michael and Holly have sex for the first time, and Michael holds a fund-raiser for the office after it is burglarized. Dwight confides in Phyllis after Andy and Angela set a wedding date, and Jim runs into Pam's ex-fiancé Roy.

Murder: Eric Tamiyasu Wanted: Dark Dante Legend: Skeleton Canyon Treasure Wanted: Terry Lee Conner and Joseph Daugherty Wanted: Joe Smith Update: Wanted: Richard Cepulonis

Legend: Boston Strangler Lost: Wendy Von Hubben/Murder: Jesse Howell Mystery: Interceptors Lost: Dolores Stradt