Oliver and Barry hide Kendra and Carter in a remote location while they try to figure out how to defeat Vandal Savage; Felicity, Thea, Diggle and Laurel work to come up with a weapon to destroy Vandal.
Prometheus goes to extreme lengths to destroy Oliver. In flashbacks, Oliver’s violent tendencies come to a head in a confrontation with Anatoly.
Oliver discovers there’s a new vigilante in Star City when the bodies of two criminals are dropped at the SCPD. In flashbacks, Oliver faces Konstantin Kovar.