Streets of Fire

"Streets of Fire" is the twenty-second episode of the second season of Arrow, and the forty-fifth episode overall. It aired on May 7, 2014.

Synopsis
Oliver rallies his team as Slade's soldiers attack the city. Felicity gets a call from S.T.A.R. Labs with game-changing news and Thea comes face-to-face with her father – Malcolm Merlyn.

Plot

 * As Slade's men continue to terrorize the city, Felicity joins Diggle and hits Isabel with a van so he can escape, and Malcolm Merlyn returns to the city to save Thea. S.T.A.R. Labs successfully makes a cure for the Mirakuru, but Slade sends men to acquire it before Oliver. Finally trusting Lance, the police force pledges to help the Arrow stop Slade's men, and Quentin is re-promoted to detective to lead the other officers. Slade reveals to Blood that he plans to destroy the entire city, people and all, in his quest for vengeance against Oliver. As a result, Blood steals the cure and gives it to Oliver in return for help saving the city. For his betrayal, Slade has Isabel kill Blood. Oliver tests the cure on Roy after Amanda Waller reveals that she intends to bomb the city at dawn to avoid Slade's men from attacking the rest of the country. In flashbacks, Oliver boards the "Amazo" to rescue Sara, after she was captured by Slade, with specific orders for Anatoli to destroy the ship if they do not return within an hour. However, they are both captured by Slade.

Behind the scenes

 * This episode, as with the first season episode,, is named after a Bruce Springsteen song, both of which coincidentally are from the same album, Darkness on the Edge of Town.

Production
Preparation ran from March 18 until March 26, 2014. Shooting ran from March 27 until April 7, 2014.