Colton Haynes

Deadshot returns to Starling City after taking down a U.S. Ambassador and six others overseas. By keeping tabs on A.R.G.U.S.'s manhunt for the assassin, Oliver, Diggle, and Felicity learn that a sting operation is underway to capture Deadshot -- alive. Diggle is determined to see his brother's killer dead, with or without Ollie's help. Meanwhile, Laurel takes drastic steps to protect a young witness, exacerbating friction between Tommy and Oliver. Later, Roy Harper unconventionally pursues all leads to find his new hero, but runs afoul of Detective Lance. Back on the island, Oliver recalls how Shado helped him incrementally gain confidence with a bow and hit the target for the first time.

Felicity tells Oliver he's all work and no play, so he asks Detective McKenna Hall on a date. A jewel thief named Dodger (guest star James Callis) hits Starling City and targets someone very close to Oliver. Meanwhile, while working with Laurel, Thea gets her purse stolen by a very fast pickpocket named Roy Harper (guest star Colton Haynes). And Moira makes a move against Malcolm.

Heroes are forged and sacrifices made in this epic season finale as Oliver and Diggle race to stop the Dark Archer from unleashing his vengeance on The Glades. However, they run into a roadblock after Detective Lance picks up Felicity for questioning. Tommy and Oliver's already tumultuous relationship takes a turn for the worse after Oliver makes a confession about Laurel. After hearing of the danger in The Glades, Thea races to find Roy, inadvertently putting herself directly in the line of fire for Malcolm's devious plan. On the island, Oliver, Slade and Shado are locked in a life-or-death struggle against Edward Fyers (recurring guest star Sebastian Dunn) as his missiles lock on a full Ferris Air jetliner.

With the Undertaking days away, Malcolm dons his black hood to conclude business with seismologist Dr. Brion Markov (guest star Eric Floyd) and his team. Oliver and Moira entertain a number of surprise -- and mostly unwelcome -- visitors. Hooded confrontations at home and the Meryln Global Group reveal dark secrets. Meanwhile, Roy and Thea are still looking out for a hero. Laurel makes a decision after Tommy's revelation. In a flashback to the island, Oliver, Slade and Shado struggle to prevent Fyers (guest star Sebastian Dunn) from shooting a Ferris Air jet out of the sky.

With his nightclub set to open and a new romance brewing with McKenna, Oliver is as happy as he's been since returning to Starling City. But when Oliver's ex, Helena Bertinelli aka The Huntress, suddenly returns to town, she threatens to destroy everything and everyone he cares about. Meanwhile, Laurel and her father struggle with the return of Laurel's mother, Dinah Lance (guest star Alex Kingston), who claims she has proof Sara is still alive. Thea gets Roy Harper a job at Oliver's club, but he's not too inclined to stop his life of crime. Oliver and Tommy are thrilled they were able to get EDM megastar Steve Aoki (guest starring as Himself) to play at the opening of their new nightclub, Verdant.