Criminal physicist Doctor Arthur Light captures the League with light rays after first drawing them in by capturing Aquaman, then sending the League to different planets based on their weaknesses. He then orders Snapper Carr to write this down, before imprisoning him in a light field. He has not realized Superman and Batman impersonated each other, allowing Superman to escape the world he was sent to and rescue the other members. Light fools the League with three duplicates of himself that are apparently committing robberies of light-associated objects, though they are actually placing devices around the world. Green Lantern realizes this trick and fakes his death to track Doctor Light, finally stopping him before he pulls the lever that would have set off the light impulses allowing him to take over the world. A retcon introduced in Secret Origins #37 reveals that this character is actually the second Doctor Light. According to the retcon, his predecessor was his partner at S.T.A.R. Labs, a scientist named Jacob Finlay. Finlay created a technologically advanced suit to control light allowing him to be a minor superhero, but was accidentally killed by Arthur Light (though Finlay's death may have been caused by hiding his costume in a computer console, causing it to malfunction). Light took the suit and the "Doctor Light" codename. He is periodically haunted by Finlay's ghost through the years, but can use the light generated by the suit to drive off this spirit.