Complete story — includes the ending
In flashbacks to island five months previous, Slade Wilson heads to the A.R.G.U.S. ship alone while the others take refuge in the plane. Samantha Clayton runs off to find her son, William, and Thea follows. Diggle's injured while rescuing Felicity. Following the explosion, Oliver finds Thea in critical condition. A dying Samantha asks him to look after William. Dinah Drake and Quentin Lance are attacked by Black Siren, whom he shoots. She is saved by an unknown man. In the present, Thea is still comatose and William blames Oliver for his mother's death. Black Siren and her mercenary team attack the Star City Police Department (SCPD) station. During another confrontation, John's hesitation gets Rene injured. Black Siren catches Team Arrow off guard by attacking the hideout before being driven off. Quentin's reluctance to harm Black Siren, his dead daughter's doppelgänger, allows her escape. Oliver arranges another hearing for Rene to reclaim his daughter. Curtis discovers that Black Siren stole a prototype T-sphere. Slade leaves to find his son, advising Oliver to choose between vigilantism and William. Oliver and William reconcile. Pictures of Oliver wearing the Green Arrow suit leak to the media.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Arrow season 6. HTML formatting and reference markers removed. · Content license