The aliens, known as the , are nocturnal and have begun constructing massive "smoke factories" across the globe to block out the sun and plunge Earth into perpetual darkness. To stop them, the heroes split into three teams to sabotage these facilities:
They infiltrate a factory in Metropolis but are eventually overpowered and captured.
" Secret Origins: Part II " is the second installment of the three-part series premiere of the Justice League animated series, which originally aired on . This episode is pivotal as it marks the first time the iconic team— Superman, Batman, Wonder Woman, Green Lantern (John Stewart), The Flash (Wally West), Hawkgirl, and Martian Manhunter (J'onn J'onzz) —officially unites to face a global threat. Plot Summary