Complete story — includes the ending
Trying to learn more about the Secret Society, magic and science accidentally collide swapping the minds of Lex Luthor and Flash. The Justice League attempts to contain a super-speed powered Luthor on the Watchtower, while Flash tries to hide the change from the Secret Society. Lex learns of Flash's identity, but it is of no use to him. Flash also allows the League to learn about Lex's new plan for the society and learn about the scale of their operations. Note: Lex Luthor's dialogue and manner of speaking in Flash's body is a nod to Flash's voice actor Michael Rosenbaum, who also portrayed Luthor in the live-action show Smallville.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Justice League Unlimited episodes. HTML formatting and reference markers removed. · Content license