Season six key story arcs involve Clark (Welling) trying to recapture several escaped criminals from the Phantom Zone, the destinies of Lionel (Glover) and Lex (Rosenbaum) following the aftermath of Lex's possession by Zod and Lionel's adoption as the emissary of Jor-El, and the introductions of DC Comics characters Jimmy Olsen, Oliver Queen and Martian Manhunter, played by Aaron Ashmore, Justin Hartley, and Phil Morris respectively. Other key storylines involve Lana and Lex's marriage, as well as Lex's secret 33.1 projects.