Everyone bands together to try to stop Samuel from taking the lives of thousands. Peter joins forces with his most unexpected ally to save Emma. Meanwhile, H.R.G.’s life hangs in the balance as he and Claire find themselves trapped underground with oxygen quickly running out. Elsewhere, Hiro starts to come to grips with the decisions he has made and is called into action to help stop a disaster.
President Hassan’s actions become paranoid and Dana’s ex faces capture, while Renee and Jack kick open a hornet’s nest among New York’s Russian underworld.
Following Amanda’s public revelation that their daughter was responsible for the MAGLEV tragedy, the Graystones must face the wrath of angry Capricans.
Patrick Jane and the CBI team investigate when the body of a high-end luxury car sales woman is found in the trunk of a Bentley in the dealership’s showroom.
Jeff and Britta meddle in Annie’s love life when she starts dating Britta’s ex, Vaughn. Pierce feels left out of Troy and Abed’s movie night.
Claire is upset to find that her friend Valerie is better than her. In the meantime Mitchell helps Gloria with legal issues and Jay had a hard time in the locker room.
Frankie makes a deal with her kids, that if they do their homework and keep chores she won’t nag them. Meanwhile, Mike takes a job as a night driver with Bob.
Tensions are high as Peter’s appeal begins while Alicia has to defend a wealthy client who doesn’t seem that innocent, even after he’s found not guilty of murdering his wife. Diane takes precautions when a prisoner she put in jail is to be released from prison.
When June’s granddaughter suffers renal trauma, Neal stumbles upon a cruel scheme to harvest human organs and brings the case to Peter.
After a violent tremor shakes a Manhattan office building to its core, leaving only one survivor who leads the Fringe Team to believe he is not from this reality. Walter surmises that what shook the building was not geologic, but rather something discovered by him and William Bell many years ago. With another catastrophe imminent, the team races to Jacksonville, the site of Walter and William’s experiments, forcing Olivia to face her mysterious past in an effort to save hundreds of people from certain death.