A few years ago, there was a thread The best '66 Batman villain according to you that listed fifteen classic villains from the TV series which featured Adam West as Batman and Burt Ward as Robin (not to mention Yvonne Craig as Batgirl for the last season). But, there were some short-comings with that thread/poll, including the possibility some people may have been basing their choices on the more recent version of the characters as seen in the then current comic book stories.
So, we'll try this again, but now we'll specifically state the name of the actor(s) who played those villains, which means we were unable to include all fifteen villains named in the original thread.
Choices this time are:* The Bookworm (Roddy McDowall)
* Catwoman (Julie Newmar) - Season One and Two
* Catwoman (Lee Meriwether) - 1966 Batman movie
* Catwoman (Eartha Kitt) - Season Three
* Egghead (Vincent Price)
* The Joker (Cesar Romero)
* King Tut (Victor Buono)
* The Mad Hatter (David Wayne)
* Mr. Freeze (George Sanders) - Season One
* Mr. Freeze (Otto Preminger) - early Season Two
* Mr. Freeze (Eli Wallach) - later in Season Two
* The Penguin (Burgess Meredith)
* The Riddler (Frank Gorshin) -Season One and Three
* The Riddler (John Astin) - Season Two
* Shame (Cliff Robertson)
And my apologies to fans of The Clock King (Walter Slezak); False Face (Malachi Throne); Louie the Lilac (Milton Berle); Marsha, Queen of Diamonds (Carolyn Jones); and Olga, Queen of the Cossacks (Anne Baxter) who were included last time but were left out of this poll to make room for those villains portrayed by more than one actor.