"The Devil's Greatest Trick" is the thirteenth episode of the sixth season of Arrow and the one-hundred-twenty-eighth episode overall. It aired on February 8, 2018.


Cayden James discovers a secret about Green Arrow that pushes him over the edge. Knowing everyone and everything he loves is in danger, Oliver must decide if he can do this alone or if he needs to turn to his old teammates for help. William starts to demand more of Oliver's time.[1]




  • This episode possibly takes place after the events of The Flash episode "True Colors" in which Barry has been released from prison.
  • This is the first time since "The Trial of The Flash" where Barry appears on-screen as The Flash.
  • Black Siren can be seen wearing one of the power-dampening collars that was shown in the Crisis on Earth-X crossover, having then been used by the Earth-X Nazis to suppress the powers of meta-human prisoners, as well as to deliver a painful electric shock to any inmate trying to escape.[2]
  • The title mainly refers to the twist that took place at the end of the episode.
  • William can be seen wearing a backpack with the Flash's lightning bolt on it.


  1. Arrow Spoilers: “The Devil’s Greatest Trick” Description - GreenArrowTV
  2. "Crisis on Earth-X, Part 3"