Mark must meet with a therapist to regain his badge after being suspended by the FBI; Demetri reluctantly teams with CIA agent Vogel to search for Lloyd; Janis learns family secrets about Simon.

Mark and his team search for Demetri, while terror suspect Alda promises to give Zoey information on Demetri's whereabouts. Elsewhere, Olivia learns the identity of who sent her the text message about Mark's flashforward.

Mark does everything in his power to protect Gabriel, who is the bridge between Dyson Frost and the Global Blackout. Aaron locates his daughter's captors and puts his life on the line in order to rescue her, while Simon comes face to face with the head of the nefarious organization that may be responsible for the blackout.

Mark continues his interrogation of Hellinger in a desperate attempt to find out when the next blackout will occur. Demetri must choose between helping Janis and Simon break into NLAP to stop the blackout from occurring, or turning the fugitive Simon in to the FBI. Elsewhere, Lloyd finds the common denominator that can help him solve the complex equation he was working on in his flashforward.

The day of the prophesized flashforwad date arrives as everyone waits to see if their predictions take place. Mark uncovers the date of the next blackout, and Simon, with Demetri, attempts to stop it from happening by breaking into the NLAP mainframe.