Darby Lynn Totten

While investigating a series of extraordinary bank robberies that defy the laws of physics, Walter realizes that the high-tech thieves are after something of his.

While investigating a mystifying incident at Massive Dynamic, Olivia seeks to rid her consciousness of Agent Scott and Peter's past catches up with him.

When another mysterious virus emerges aboard an international flight, leaving freakish remains, Peter & Olivia are forced to go undercover to investigate the latest bizarre threat.

With the mastermind behind Kate’s death uncovered, Peter and Neal explore their pasts to gain answers. Neal explains the first time he met Kate (guest star Alexandra Daddario) and Mozzie, and Peter details the circumstances behind Neal's first arrest.

On the way home with his family, Danny hits a man with his car who is fleeing from a gunman, and his family gets caught in the crossfire when Danny fires his weapon at the gunman. Frank deals with 9/11 guilt from impending loss of a friend whom he worked alongside at Ground Zero.