The Department of Extranormal Operations (DEO) is a government agency in the DC Universe appearing in American comic books published by DC Comics. It was co-created by Dan Curtis Johnson and J. H. Williams III and first appeared in Batman #550 (1998). The agency was the focus of the Chase series. It is featured in the Supergirl television series. The agency has a complicated relationship with the depiction of law and constitutional rights in the DC Universe.