After having been kidnapped by Tobias Church, Star City mayor Oliver Queen creates a special force team of trusted police officers. When one of these officers leaves the precinct through a backdoor, he sees a figure looking like Green Arrow on the roof above him. Believing the person to be Green Arrow, the policeman asks whether Green Arrow wants something from him. The person, however, is not Green Arrow but Prometheus who shoots an arrow into the man's chest. Panicking, the man draws his pistol and shoots at Prometheus who easily dodges and evades the bullets. With a throwing knife, Prometheus disarms the policeman who runs off but is brough to fall by another of Prometheus' throwing stars. Prometheus approaches him and tells him that he is most certainly not Green Arrow before finishing off the policeman with a Katana.
After Church has almost killed the Green Arrow in a fight, Prometheus confronts Church. After killing two of Church's henchmen with arrows, Prometheus hurls an axe in Church's back. To the injured Church he reveals that he will kill Church should Church murder the Green Arrow, claiming that the Green Arrow belonged to him alone.
- Lt. Conahan
- Two unnamed bodyguards
- Although he shares his name with a DC villain, it has been explained that the two villains are not the same and the the Arrowverse-Prometheus is an original villain. It is also implied that Oliver Queen's actions in the first season are responsible for Prometheus' creation.
- He seems to share some traits with Jason Todd/Arkham Knight as both are vigilantes who wore suits identical the hero they loathed but with a full mask and using a voice filter.
- The main suspects for Prometheus' identity are Tommy Merlyn, Roy Harper and Detective Billy Malone. While Malone is suspected mainly for being the new character, Roy is suspected given the previously mentioned resemblance Prometheus shares with Arkham Knight. It should also be noted that Jason also hated Batman because he thought he'd simply replaced him with Tim Drake as Robin, and Prometheus made his debut as soon as Oliver began recruiting a new team. Tommy is primarily speculated as the season is about legacy both Oliver's desire to maintain his and honor Laurel's, and having the emobidment of his greatest failure, his inability to stop the Undertaking, would make it more emotional.