Team "Arrow" is in deep trouble. In "What We Leave Behind," the episode following the "Invasion!" crossover, Oliver discovers that Prometheus knows his and his fellow vigilantes' secret identities. What follows is an explosive confrontation between Green Arrow and his mysterious foe.
The photos below show Green Arrow and Prometheus coming to blows, but Oliver is not alone. He has a little help from Spartan and Wild Dog, and it looks like they're going to fight fire with fire.
According to the episode's official description,
PROMETHEOUS MAKES A DEADLY MOVE AGAINST OLIVER AND THE TEAM — After Prometheus attacks Curtis (Echo Kellum), Oliver (Stephen Amell) realizes Prometheus knows all of Team Arrow’s secret identities and is planning to come for them one by one. Felicity (Emily Bett Rickards) and Detective Malone (guest star Tyler Ritter) discover a clue that links Prometheus to Oliver’s past. Antonio Negret directed the episode written by Wendy Mericle & Beth Schwartz (#509). Original airdate 12/7/2016.
Starring Stephen Amell as the Emerald Archer, "Arrow" airs Wednesdays at 8 pm ET/PT on The CW. The series also stars Emily Bett Rickards, David Ramsey, John Barrowman, Willa Holland and more.