The 1970s
The 1970s were rather uneventful for the hero. Visually, he underwent very little transformation. His comic success continued steadily, yet the 1970s lacked other outlets for the hero to be shown to the world.
The Joker evolved into the psychopathic villain we know him as now as opposed to the prankster he was previously portrayed as. The end of the decade was the breeding ground for the ‘The New Adventures of Batman’ animated series.