universe's succeeding U.S. president, Susan Brayden; she informs the new chief executive that the United States government of her universe (Earth-38) founded the DEO for monitoring and countering extraterrestrial threats, and the president agrees that her administration would establish their own agency in response to the Dominators' attacks.`` During the final part of the later Arrowverse crossover "Crisis on Infinite Earths", following the multiverse being rebooted, Supergirl's universe was merged with others including Earth-1's to create Earth-Prime and the DEO was altered to become a subsidiary of LuthorCorp. The DEO is featured in the Legends of Tomorrow episode "Ground Control to Sara Lance". When Ava Sharpe tries to contact the DEO to help find the aliens that took Sara Lance, all that is shown is the DEO headquarters still in ruins. Gideon brings this historical moment up with Ava causing them to go to plan B and enlist Esperanza "Spooner" Cruz per the suggestion of Behrad Tarazi. Video games The DEO had a brief appearance in the intro level to Batman: Arkham Origins Blackgate, where they acted as adversaries to both Batman and Catwoman, the former due to mistaken association with the latter, and the latter due to stealing classified data. References External links Fictional detective agencies Fictional government investigations of the paranormal Fictional intelligence agencies Fictional military organizations Fictional elements introduced in 1998 DC Comics law enforcement agencies