Oliver Queen on vankilassa, eivätkä vartijat ja muut vangit tee hänen oloaan helpoksi. Diaz on yhä karkuteillä, ja Felicity ja William elävät todistajansuojelussa. Kaiken kukkuraksi Star Cityyn saapuu uusi Vihreä Nuoli jakamaan oikeutta.
Star Cityyn saapuu pahamaineinen Pitkäjousimetsästäjien rikolliskopla, joka iskee ARGUSin tiloihin ja varastaa tärkeää laitteistoa. Oliver yrittää päästä Diazin jäljille ja tekee sopimuksen toisten vankien kanssa.
Still in prison, Oliver (Stephen Amell) faces his biggest challenge yet.
Felicity (Emily Bett Rickards) learns something new about Oliver (Stephen Amell) that shocks her.
Slabside becomes even more dangerous after a guard is murdered and everyone is a suspect.
Oliver (Stephen Amell) makes a choice that will affect his entire life, as well as the lives of everyone he cares about.
With Oliver (Stephen Amell) and Barry (guest star Grant Gustin) still stuck in the other’s bodies, the two get a lead on John Deegan (guest star Jeremy Davies) and head to Gotham City with Supergirl (guest star Melissa Benoist) to figure out why their reality has changed.
Oliver (Stephen Amell) is ready to get back to work with the SCPD and to focus on his marriage with Felicity (Emily Bett Rickards).
The past comes back to haunt both Oliver (Stephen Amell) and Laurel (Katie Cassidy).
Oliver (Stephen Amell) and Felicity (Emily Bett Rickards) are disappointed after they learn that William (guest star Jack Moore) is hiding something from them.
Team Arrow attempts to work with the Star City Police Department but much to Oliver’s (Stephen Amell) frustration, things don’t go as planned.
Mia (guest star Katherine McNamara) and William (guest star Ben Lewis) venture into the Glades on a dangerous mission.
Laurel (Katie Cassidy) learns about some damaging information that affects Emiko (Sea Shimooka).
After being accused of murder and having her criminal past exposed, Laurel (Katie Cassidy) goes full Black Siren and teams up with an old criminal acquaintance, Shadow Thief (guest star Carmel Amit), to go on a crime spree around Star City.
After the Ninth Circle delivers a major setback for Team Arrow, Diggle (David Ramsey) reluctantly reaches out to a Four-Star General of the Defense Intelligence Agency (guest star Ernie Hudson) for help, despite unresolved tension from their past.
When they learn of an upcoming attack on the city, Team Arrow calls Roy Harper (Colton Haynes) to help them stop the Ninth Circle.
Oliver (Stephen Amell) finds himself in a precarious position.
The battle between Oliver (Stephen Amell) and Emiko (Sea Shimooka) comes to a boiling point which brings back some familiar faces and leaves others in dire jeopardy.