Explorer Bruce Wayne accidentally unleashes an ancient evil, and returns to Gotham after being away for two decades. There, Batman battles Lovecraftian supernatural forces and encounters allies and enemies such as Green Arrow, Ra's al Ghul, Mr. Freeze, Killer … David Giuntoli, Patrick Fabian, John DiMaggio, Karan Brar, Navid Negahban, Darin De Paul, Emily O'Brien Added on HBO 2023-07-15.