The Mask - S1-E8

Trivia: Richard Sionis is the father of Roman Sionis, aka Black Mask, another capo of Gotham city.


Viper - S1-E5

Trivia: The viper drug is a prototype of the venom used by Bane, another enemy of Batman.


The Blind Fortune Teller - S1-E16

Trivia: The flying Graysons in the circus are the family of Dick Grayson, aka the original Robin.


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