OLIVER IS PUT TO THE TEST — Oliver (Stephen Amell) finds himself in a precarious position. SCPD shows up with a warrant for Felicity (Emily Bett Rickards).
ARSENAL RETURNS TO HELP THE TEAM — When they learn of an upcoming attack on the city, Team Arrow calls Roy Harper (Colton Haynes) to help them stop the Ninth Circle. However, things go awry and there is massive collateral damage. As Captain of the SCPD, Dinah (Juliana Harkavy) investigates what happened in an episode that takes on a true crime narrative and tone.
ERNIE HUDSON (“GHOSTBUSTERS”) GUEST STARS — 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. Meanwhile, Oliver (Stephen Amell) discovers a piece of information that he believes will turn Emiko (Sea Shimooka) against the Ninth Circle. Alena (guest star Kacey Rohl) returns with an interesting proposal for Felicity (Emily Bett Rickards).