The Batman (2004)
0 continuity mistakes in season 5
Starring: Alastair Duncan, Rino Romano, Evan Sabara
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Character mistake: Artie says he'll recite pi to 100 decimal places. After the first few numbers, it skips to him finishing up by saying "46375." The last 5 digits would be "70679." In fact, the sequence "46375" doesn't occur until the 95,517th position.
The Joker: Sorry Batman, but Joker always laughs last.