Ra's al Ghul gives Oliver 48 hours to find Sara's murderer... or watch as the League kills 50 citizens a day. Meanwhile, Ray tries to apologize to Felicity for kissing her, and Oliver discovers who Sara's killer is.moreless
After receiving some shocking news Stephen attempts to restore order in both his worlds by striking a deal with Jedikiah.
Cara and Russell contend with a new break-out and must also deal with an ULTRA trap.
Meanwhile Jedikiah is closer to developing a secret technology that could change his future.
King and Maxwell investigate a possible high-level cover-up after Michelle is questioned about an assassination attempt on a visiting diplomat.
One year after their battle with the Leviathans, Sam finally finds his brother Dean, who reveals what happened to him and Castiel in Purgatory. They soon reunite with the prophet Kevin and learn about another Word of God... and an unbelievable opportunity.moreless
Walter is forced to relive his past while investigating a series of spontaneous human combustions, while David Robert Jones begins his end game.