Season 05, Episode 07 – “Vigilante”
When the bodies of two criminals are dropped at SCPD, Oliver realizes there is a new vigilante in Star City and the team becomes divided over whether they should stop someone who is helping keep the city safe. Meanwhile, Diggle gets frustrated with his new situation; and Thea fights for Lance who confesses a shocking secret. In flashbacks, Oliver finally sits down with Konstantin Kovar.
Oliver Queen and his father are lost at sea when their luxury yacht sinks. His father doesn’t survive. Oliver survives on an uncharted island for five years learning to fight, but also learning about his father’s corruption and unscrupulous business dealings. He returns to civilization a changed man, determined to put things right. He disguises himself with the hood of one of his mysterious island mentors, arms himself with a bow and sets about hunting down the men and women who have corrupted his city.