Batman: Caped Crusader's second season reimagines the Joker as a colder, unsettling figure inspired by 1940s German Expressionist cinema, prompting speculation that the character is being depicted as a Nazi. Voice actor Matthew Needham addressed the question directly with IGN, discussing how showrunners Bruce Timm, James Tucker and Geoffrey Thorne pushed him towards a soft-spoken, calculating portrayal that departs sharply from previous versions of the villain, including Mark Hamill's famously manic take. The distinctive interpretation matters because it underscores the animated series' broader approach of radically reinventing Batman's rogues' gallery for its noir-tinged 1940s Gotham setting.

This version of Joker never laughs, speaks with a German accent, and talks of wanting to exterminate the "vermin" of Gotham, fuelling the Nazi comparison, though the article notes his true background remains deliberately ambiguous, consistent with the character's traditionally multiple-choice origin story. Needham said he drew instinctively on works such as The Cabinet of Dr. Caligari and The Man Who Laughs rather than revisiting other actors' performances, and that he developed his own private backstory for the character while recording, though further details were left for elsewhere in the interview.