Season 6 Episodes
THE AFTERMATH — Oliver deals with the fallout of the explosion on the island.
Oliver tries to balance being the mayor, the Green Arrow and a father to William (guest star Jack Moore). Anatoly (guest star David Nykl) returns to Star City with a deadly agenda.
03: Next of Kin
A rogue black ops team led by Onyx breaks into Kord Industries and steals something lethal. Oliver struggles to connect with William (guest star Jack Moore) so he reaches out to a surprising source for help.
Just as Oliver starts to get things in order, Black Siren launches another attack on the citizens of Star City.
05: Deathstroke Returns
Slade returns and asks Oliver for helping in tracking down his son. When they learn Joe has been taken hostage by mercenaries, their mission to save him gets complicated by a terrible revelation that could shatter Slade's hopes of reunion forever. Meanwhile, Vigilante reappears in Star City.
06: Promises Kept
As Slade continues to uncover clues about his son's last few years, Oliver makes a big decision. Meanwhile, the Green Arrow leads the team into battle against '' The Dragon'', a villian who is stealing valuable tech in Star City.
Oliver celebrates Thanksgiving with his family but the happy moment is interrupted. Meanwhile, Black Siren returns to wreak havoc on the holiday.
08: Crisis on Earth-X, Part 2
Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold (guest star Wentworth Miller), The Ray (guest star Russell Tovey), Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth’s mightiest heroes—Green Arrow, Supergirl, The Flash and White Canary—lead their teams into battle to save the world.
09: Irreconcilable Differences
Quentin Lance is kidnaped by Black Siren and Cayden James, who are looking to trade Lance’s life for a weapon of mass destruction. Oliver and Team Green Arrow must figure out a way to save Lance while still keeping the city safe.
Oliver Discovers a Shocking Truth about Cayden James (guest star Michael Emerson, Person of Interest, Lost)—Despite losing half his team, Oliver remains confident that he, Felicity and Diggle can stop Cayden James and Black Siren. However, when he discovers one of Cayden’s secrets, he decides to team up with an unlikely ally. Meanwhile, Dinah spends time with Vince.
11: We Fall
Cayden James (guest star Michael Emerson) ups the ante by launching his plan to take control of every aspect of the city. Despite the scope of Cayden’s plan, Oliver is determined to foil it with just the Original Team Arrow—and without the aid of Rene, Dinah, or Curtis. But things get complicated when William (guest star Jack Moore) is endangered as a result of Cayden’s handiwork.
12: All for Nothing
Oliver continues his battle with Cayden James (guest star Michael Emerson). Dinah and Oliver have a major disagreement that endangers the life of one of their own.