When a subway train is thrown off the track by 60,000 gallons of flood water, a partially skeletonized body emerges out of the overflow. While Dr. Sweets, a passenger on the derailed train, copes with post traumatic stress, the rest of the team and intern Daisy Wick get to work on identifying the victim as Martin Aragon, a professional ghost writer caught up in a deadly love triangle. Meanwhile, Brennan releases her second book to great success, but has to accommodate a nosy reporter, and Sweets' near-death experience leads him to make a drastic decision.

Catherine and Detective Vartann are thrown together in a hotel room for 24 hours as they stake out a duo making drugs in the room next door. Meanwhile, Nick and Langston work a case that involves a fetish which has become big business in Vegas.

When Alex's younger brother, Aaron, shows up at Seattle Grace-Mercy West with a hernia, it's up to Alex to get Bailey's approval for his pro bono surgery. Matters are further complicated when Aaron discloses that his family has not heard from Alex since he arrived in Seattle, and parts of Alex's past long kept secret are revealed to his friends and fellow doctors.

Actor Sam Worthington; sportscasters Mike Greenberg and Mike Golic; Patty Loveless performs.

Ambushed by angry hunters, Sam and Dean are shot and killed and sent to Heaven. Castiel warns Dean that Zachariah is looking for them in Heaven so they need to lay low while searching for an angel named Joshua who can help them since he talks directly to God. While searching for Joshua, the brothers run into some old friends and family members.

David Frum gets fired from the Republican cult, and Judith Shulevitz discusses the Sabbath.

Tonight's guests are actor Robin Williams and philosopher Jonathan Dancy.

Patrick and the CBI team investigate the murder of a tutor, and find a mysterious little red box near the body, starting a chain of events that turns the murder into the search for a priceless ring stolen from the British Museum. Meanwhile, Lisbon is worried when a new boss, Madeleine Hightower, takes command of the CBI, as well as mysteriously learning about Rigsby and Van Pelt's relationship.

Anna brings a surprising guest along when she pays a visit to Damon. Elena and Stefan go on an awkward double date with Caroline and Matt, but Stefan and Matt find they have some common ground. Jenna reunites with her old friend Kelly, and Jeremy’s relationship with Anna takes an unexpected direction.

Lost: Michael Rosenblum Murder: Ralph Probst Update: Lost: Avery Norris Wanted: Sagebrush Rebellion Mystery: Kathleen Burghardt and Eric Danowski

Mystery: Johnny Lee Wilson Legend: Tatum House Wanted: Missy Mundy and Jerry Strickland Mystery: Plane Jumper