Suggestions by @smhc2005

Liberace

as Chandell in Batman '66: Season Three and a Half

Joan Collins

as The Siren in Batman '66: Season Three and a Half

Vincent Price

as Egghead in Batman '66: Season Three and a Half

Sid Caesar

as The Mime in Batman '66 Season 4 Ideas

Leonid Kinskey

as Professor Overbeck in Batman '66: Season Three and a Half

Lee Meriwether

as Catwoman II in Batman '66: Season Three and a Half

Otto Preminger

as Mister Freeze II in Batman '66: Season Three and a Half

George Sanders

as Mister Freeze I in Batman '66: Season Three and a Half

Eli Wallach

as Mister Freeze III in Batman '66: Season Three and a Half

Eartha Kitt

as Catwoman III in Batman '66: Season Three and a Half

Frank Gorshin

as The Riddler in Batman '66: Season Three and a Half

Julie Newmar

as Catwoman I in Batman '66: Season Three and a Half

Burgess Meredith

as The Penguin in Batman '66: Season Three and a Half

Cesar Romero

as The Joker in Batman '66: Season Three and a Half

Marion Ross

as Linda Page in Batman '66: Season Three and a Half

Yvonne Craig

as Barbara Gordon in Batman '66: Season Three and a Half

Stafford Repp

as Chief O'Hara in Batman '66: Season Three and a Half

Neil Hamilton

as Commissioner Gordon in Batman '66: Season Three and a Half

Burt Ward

as Robin in Batman '66: Season Three and a Half

Adam West

as Batman in Batman '66: Season Three and a Half