The DC Series You Likely Forgot Starred Law & Order: Criminal Intent's Leslie Hendrix

Back in "Gotham" Season 3, Leslie Hendrix joined the DC series as the villain Kathryn Monroe. While she's not as famous as Jeremiah Valeska (Cameron Monaghan), the Penguin (Robin Lord Taylor), or the Riddler (Cory Michael Smith), she's tied to one of the most iconic villainous organizations in the Batman mythos: the Court of Owls. Monroe first shows up in Season 2, Episode 21, "Wrath of the Villains: A Legion of Horribles" and is a recurring villain as the Court tries to control Gotham from afar (via Fandom).

Monroe frequently works with Hugo Strange (BD Wong) — another classic "Batman" villain — on his program to resurrect the dead with their memories intact. She even orchestrates the creation of an exact clone of Bruce Wayne, named Subject 514A. All this is to say that Monroe and the Court of Owls are an incredibly powerful set of villains in the "Gotham" universe, although she doesn't make it out alive.

In Season 3, Episode 19, "Heroes Rise: All Will Be Judged," the super-powered Nathaniel Barnes (Michael Chiklis) goes on a rampage through the Gotham City Police Department, and Monroe tries to order him to take her to safety. Unfortunately, this doesn't exactly go to plan, because Barnes beheads her on the spot. Later, in true comic book fashion, she briefly returns as part of a funeral in James Gordon's (Ben McKenzie) hallucination.

Hendrix's villainous role in "Gotham" is much different from her role in "Law & Order: Criminal Intent," that's for sure.