While we're discussing episodes of B:TAS that explore the history of the character of Batman, I'd like to use it as a flimsy excuse bring up my favorite episode-Beware the Gray Ghost. As a tot waiting for Batman '89 to be released, I was lucky enough to be exposed to Adam West as the Caped Crusader before I saw any other portrayal of the character, so hearing him as the pulp character that inspired Bruce Wayne was beyond awesome, maybe the most perfect piece of casting in a show that literally had a great voice for every single character.