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

Hurt and betrayed by a close ally, one castaway learns the hard way that loyalty isn't always easy, and one powerhouse learns from experience that old grudges die hard.

Demetri, Janis, Simon and Vogel go to Somalia to search for clues; Bryce tells Nicole he has cancer; Olivia tries to get her daughter to tell her what she saw in her flashforward.

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. Kevin Bray directed the episode written by Bryan Oh & Andrew Chambliss.

When Alex's brother shows up at the hospital with a hernia, Alex must get Bailey's approval for pro-bono surgery; parts of Alex's past are revealed to his friends and colleagues.

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.

Walter flashes back to 1985 while explaining Peter's otherworldly origins to Olivia. Also, Peter's mother is introduced and details of the neighboring world reaffirm that there is more than one of everything.

The remaining contestants must craft designs for a celebrity.

The CSIs investigate the murder of a casino hotels' events planner, and the investigation reveals her job of bringing in an unusual convention might have cost her her life. Meanwhile, two other hotel guests are suspicious when it turns out they are making and selling drugs to under-age partiers.

When a famed neurosurgeon and her team visit St. Ambrose, Addison is surprised to see Derek's younger sister on the team; Charlotte and Cooper try to figure out how to work together.

CBI is getting a new boss which has the team a bit worried.

Sarah narrates, the story of Steve creating a baby robot, for Brian and he to care for. Meanwhile, Laura and Jay discuss their sexual interest with each other.

Edward Norton

Judith Shulevitz

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

The Important Thing discussed in this episode is the Important Thing of Nature.

Alex finds herself back in 1983 after having been shot by Gene. Ray Carling has gained promotion and is in charge. Chris and Shaz are no longer together. Jim investigates Alex's shooting after being sent to Scotland Yard. Gene is forced to hand his badge in whilst the investigation is carried out.

30 Rock star Tina Fey is this week's American guest; chef, Heston Blumenthal, who includes salmon poached in liquorice on the menu of The Fat Duck and Aaron Johnson, star of Nowhere Boy. Music from Groove Armada ft. Will Young.