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).
“BIRDS OF PREY”; CAITY LOTZ GUEST STARS — 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. While Dinah (Juliana Harkavy) aims to bring Laurel in, Felicity (Emily Bett Rickards) refuses to give up on her friend and tries everything to get through to her, even summoning Sara Lance (guest star Caity Lotz) for help. However, Laurel rebuffs all her efforts, forcing the former friends to face off against each other.