In this episode of The Batman , the Caped Crusader investigates grave robberies in Gotham City, discovering that the villainous Black Mask is using nanotech to reanimate the dead. Batman must navigate a swarm of undead bodies, eventually using an EMP to neutralize the technology and defeat Black Mask before he can take over the city's underworld. The episode is noted for its gothic atmosphere and for elevating Black Mask from a mere mobster to a theatrical supervillain.