Summary: As Noah's life hangs in the balance, Samuel prepares to kill thousands and Peter and the others must band together to stop him and save Emma.

Summary: Betty needs to get a diamond-encrusted bra across town, and she has three ways of getting there.

Summary: Sabre comes in to take over Dunder Mifflin and Michael has difficulties accepting their new policies. Erin is waiting for Andy to ask her out while they work on a welcoming song for the company's new owners. Meanwhile, Jim and Pam interview for a local daycare center they hope ...

Summary: Addison and Cooper are counseling a couple who must pick a child to save with their newborn's cord blood. Meanwhile Dink wants to marry Maya.

Summary: Escobar Gallardo's teen daughter shows up with questions for Sean and Christian about her father, stirring guilty feelings in Sean. Meanwhile, a common cosmetic procedure on an actress goes awry.

With everyone caught up in the sensational trial of luscious young Gloria, accused of the murder of her 93 year old husband, Allison begins seeing the face of a man named Fred everywhere she goes.

Summary: A crime scene poses a national security risk when the LA team discovers the location was used to create a deadly toxin which is now missing.

Summary: The team finds themselves in a race against time when a terrorist group threatens to detonate a "dirty bomb" in the D.C. area.

Summary: Jane investigates the murder of a beautiful car salesman found dead in the trunk of a high-end vehicle at an elite car dealership.

Summary: As Derek begins his role as interim chief, he faces a potential lawsuit when Bailey and Meredith's patient awakens from anesthesia mid-surgery. Meanwhile, Teddy refuses to place Cristina on her service, as Arizona tests Alex out in Pediatrics, and Mark refuses to speak to a heartbroken Lexie.