In the Season 1 finale, the world waits to see if the flash-forward visions come true. Mark, meanwhile, learns the date of the next blackout while Simon and Demetri attempt to stop it

Mark continues his interrogation of Hellinger; Lloyd finds something that could help him solve the complex equation from his flashforward; Tracy fights for her life.

Demetri and Banks try to track down a killer; Mark reluctantly agrees to help Simon find his sister; the FBI discovers the identity of Suspect Zero.

Olivia receives disturbing news from Gabriel (James Callis); Aaron’s life is in danger as he continues to search for his daughter in Afghanistan.

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

In Somalia, Vogel and the others investigate the remaining tower for clues to the Blackout. Meanwhile, Olivia tries to convince Charlie to say what she saw during her flashforward, and Bryce tells Nicole that he has cancer.

While Demetri teams up with CIA agent Vogel to track down Lloyd, Mark must meet with a therapist to get back his badge. Meanwhile, Janis investigates Simon.

Against Wedeck’s orders, Mark and Demetri travel to Hong Kong in search of the woman claiming to know details of Demetri’s fate; Lloyd tries to come clean about his and Simon’s involvement in the global blackout – against Simon’s better judgment — and Zoey discovers the true meaning of her flashforward.