Most comics fans know that the Chameleon is more associated with Spider-Man instead of Batman. Marvel's Chameleon was introduced in the 60's as a foreign spy/master of disguise whose true face was never seen under a white mask.
Filmation's Chameleon was a 1-shot villain on The New Adventures of Batman who debuted in 1977. In truth, this Chameleon was the creation of another made-for-TV villain, Dr. Devious, but now we're getting ahead of ourselves. As most episodes in the series were wont to be this was a showcase for Len Weinrib, who voiced Chameleon/Devious and gangster Lefty (with a Humphrey Bogart mimic), in addition to his usual role as Commissioner Gordon. In short, Weinrib was the utility guy in the cast, in place of Ted Knight, who had that gig in 1968.