Lex Luthor (DC Animated Universe)

The version of Lex Luthor that appeared in the DC Animated Universe, debuting in Superman: The Animated Series and later making appearances in Justice League and Justice League Unlimited.

He is voiced by Clancy Brown.

Superman: The Animated Series
Luthor is the founder and CEO of LexCorp. He grew to resent Superman when he stole his spotlight as the hero, and usually invested heavily in some of the Man of Steel's greatest foes, such as Metallo and Livewire. Luthor was also known for his betrayals on many associates, causing many to leave LexCorp; the only one left was Mercy Graves.

Justice League and Justice League Unlimited
Luthor later fought the Justice League, but was subsequently defeated, exposed as a crook and sentenced to prison. He also learned that he had a form of radiation poisoning as a result of carrying around a chunk of Kryptonite for years.

Luthor paired up with other villains in an attempt take down the Justice League, but failed.

Luthor later redeemed himself by aiding in the defeat of the Justice Lords and was given a full pardon. After that, he entered politics and ran for the U.S. Presidency. However, still bent on destroying Superman, he created Project Cadmus and succeeded in ruining the Justice League's reputation twice: once by causing Superman and Captain Marvel to fight each other and again by having the Watchtower fire on a Cadmus-related building in New Mexico.

Lex's malevolent plans were exposed by Batman, only for Brainiac to reveal that he had been dormant inside Lex for some time. Luthor later convinced Brainiac to fuse with him because they both could reach their ultimate goals. He then battled the Justice League, proving to be one of the group's most difficult foes. However, the Flash was able to separate the two after breaking the Speed Force.

Lex went back to jail with a damaged psyche. After escaping prison again and eluding the cops, Gorilla Grodd offered for Lex to become a major player for the newly formed Legion of Doom. Joining only to revive Brainiac, Lex eventually overthrew Grodd and led the Legion into space, where he found a version of Brainiac that had been destroyed years earlier. Trapping and absorbing Tala's magic to resurrect Brainiac, he had accidentally resurrected Darkseid instead.

Warning the Justice League due to him wanting to kill Superman first, Lex and the rest of the Legion joined them to fight against Darkseid and his army. He later left the battle with Metron and discovered the Anti-Life Equation. Returning to Earth with the Equation, he offered to share the knowledge with Darkseid. The Equation supposedly destroyed (or absorbed) both Lex and Darkseid.