Neil Hopkins

After a series of murders in Lower Canaan, Ohio, is connected to a serial killer who had been executed a year ago, the BAU must find the link to the current crimes.

The six young lawyers are even more determined to bring home wins and prove they are worthy of The Mother Court, as they tackle their second round of cases. Jay must set aside his personal feelings as he defends a client with controversial beliefs, and Sandra's idealism leads to an important lesson from Ms. Krissman.

When a prominent astrophysicist is found dead in her car, Castle is led to theorize her death was the result of an alien abduction.

When a corpse is found at a landfill, dyed in a blue substance, intern Arastoo Vaziri (guest star Pej Vahdat) discovers a method that helps eliminate postmortem damages to the corpse, which leads the team back to a hair salon where the victim worked. Meanwhile Bones is feeling uncomfortable in her post-baby body, so Booth decides to do something special to boost her self-confidence.

Charlie begins a painful journey of withdrawal from drugs, surprisingly aided by Locke, whose true motive for helping Charlie is a mystery. Meanwhile, survivors struggle to find and free Jack when he's buried alive in a cave collapse. Someone might be secretly thwarting Sayid, Kate, and Boone when they enact a plan to find the source of the French transmission.