 Justin Hartley portrays Oliver Queen, a billionaire who left Star City to live in Metropolis. While in Metropolis, Oliver masquerades at night as a costumed vigilante, named "Green Arrow" by Lois. Oliver leaves Metropolis in season six, after destroying one of Lex's secret 33.1 facilities, where Lex experiments on meteor-infected individuals against their will, but he returns in season eight to search for Clark, after the latter goes missing when his Fortress of Solitude is destroyed. Hartley was a recurring guest in the sixth and seventh seasons, but became a series regular in season eight.
