Arrow: 10 Best Characters Who Only Appeared In One Episode
4. Sam Hackett
It goes without saying that Oliver Queen is defined by the shipwreck that cost him his father, as well as the actions of the latter. This came back to haunt him many times throughout his life, and one of these occasions was rather somber.
Sam Hackett was the son of Dave Hackett, the former bodyguard to Robert Queen. He was understandably shaken by his father's disappearance and turned to a life of hard vices.
The revelation that the Queen patriarch killed his father so that Oliver could survive further broke Sam and pushed him to kidnap a reporter with the intent of making Oliver resign from the SCPD. To drive his point further home, he took over the SCPD headquarters and threatened to kill every officer until Queen walked away from his heroic alter-ego.
His obsessive tendencies and poorly handled grief made Hackett one of the more tragic one-off villains in the series, and was a reminder of how Robert Queen's initial disregard for his city had long-lasting consequences.