In the season premiere episode, Oliver searches for an identity beyond The Arrow. With crime in Starling City at an all-time low thanks to the Arrow and his team, Oliver thinks he can finally balance being both the Arrow and Oliver Queen and asks Felicity out on a date. However, when a new villain (guest star Peter Stormare) emerges, who has claimed the name Vertigo from the recently deceased Count, Oliver is caught off-guard and someone close to him is hurt. Oliver and a newly suited up Roy take on Vertigo. Meanwhile, Diggle becomes a father; Lance is promoted to Captain; Laurel joins Arrow’s inner circle; and Felicity gets a part-time job at a tech store to make ends meet. Also, Oliver fights to regain his company, Queen Consolidated, but comes up against a very worthy opponent – the charming Ray Palmer (recurring guest star Brandon Routh).
Lance calls the Arrow when another archer appears in town and starts skewering businessmen. Diggle uses A.R.G.U.S. to find the archer’s identity; he is a man named Simon Lacroix (guest star Matt Ward), who goes by the codename Komodo. However, the team hits a rough patch with the mission and gets help from a surprising source – Laurel. Meanwhile, Oliver begins to worry that he hasn’t heard from Thea, which forces Roy to tell him the truth about why she left Starling City. Ray Palmer pursues Felicity. In the flashback, Maseo Yamashiro (recurring guest star Karl Yune) tells Oliver that Amanda Waller has ordered his first kill. As Oliver looks down the scope of the rifle, he sees the target is his best friend, Tommy (former series star Colin Donnell). Despite her promise to her sister, Laurel debates sharing a secret about Sara (recurring guest star Caity Lotz) with Lance.
Oliver decides it's time for Thea to return home to Starling City so he packs for Corto Maltese where Felicity has traced Thea's whereabouts. Lyla (guest star Audrey Marie Anderson) asks Diggle to go with Oliver because one of her field operatives Mark Shaw (guest star David Cubitt) has gone dark in Corto Maltese and she'd like him to look into it. Feeling responsible for Thea's departure Roy joins Oliver and Diggle on their journey. Shaw double-crosses Diggle putting numerous A.R.G.U.S. agents including Lyla at risk. Meanwhile Laurel meets Ted Grant (recurring guest star J.R. Ramirez) and Felicity adjusts to her new job.
A furious Nyssa al Ghul (recurring guest star Katrina Law) returns to Starling City and confronts Oliver about Sara’s death. When Oliver learns Malcolm Merlyn is alive, he suspects Merlyn killed Sara. Oliver and Nyssa join forces and go after the Dark Archer, intent on bringing Sara’s killer to justice. Laurel keeps her distance from Nyssa, howeverm as she blames her sister’s death on her involvement with the League of Assassins. Meanwhile, Oliver and Roy work on repairing their respective relationships with Thea, who has returned home. Nyssa discusses Oliver with her father, Ra’s al Ghul (guest star Matt Nable).
When a cyber attack brings Starling City to its knees Oliver and Felicity are pushed to their limits to contain the destruction. Life gets even more complicated for Felicity when her mother Donna (guest star Charlotte Ross) stops by for a surprise visit. Meanwhile Ted Grant (guest star J.R. Ramirez) questions Laurel's motives and Thea buys an apartment with Malcolm's estate money which infuriates Oliver. Nolan Funk guest stars as Felicity's ex-boyfriend.
After a body is found strung up in the Wildcat gym Ted Grant becomes the main suspect. Oliver and Laurel argue over Ted's innocence. Meanwhile in flashbacks when Maseo needs Oliver to remember where an informant for China White stashed key information he asks Tatsu (guest star Rila Fukushima) to help jog Oliver's memory. Roy shares a secret with Felicity.
Stephen Amell
Oliver Queen/Green Arrow
David Ramsey
John Diggle/Spartan
Emily Bett Rickards
Felicity Smoak/Overwatch
Echo Kellum
Curtis Holt/Mister Terrific
Rick Gonzalez
Rene Ramirez/Wild Dog