Arrow Reveals Prometheus' Identity
The mysterious assassin that's been terrorizing Team Arrow for months is none other than District Attorney Adrian Chase (Josh Segarra).
In the comic books, Adrian Chase is actually the alter ego of Vigilante, another masked nemesis of the Green Arrow's (Stephen Amell), who also made his debut this season.
Prometheus, by leaking the Green Arrow's involvement in Detective Mallone's murder, forced Oliver's hand into throwing his alter ego under the bus to the Star City public.
Vigilante also miraculously survived the Prometheus attack, so now Oliver must try to protect his city as a wanted cop killer with Vigilante on his tail and Adrian Chase betraying him at every step.
To make matters worse, Adrian has now kidnapped Oliver's girlfriend Susan (Carly Pope), taking their war to the next level.
The Flash has a lot of experience with mentors and close friends turning out to be the enemy and betraying his trust.