Suggestions by @smhc2005

Michael Rennie

as The Sandman in Batman '66 Season Five Ideas

Score: +1

Glynis Johns

as Lady Penelope Peasoup in Batman '66 Season Five Ideas

Score: +1

Rudy Vallee

as Lord Marmaduke Ffogg in Batman '66 Season Five Ideas

Score: +1

Van Johnson

as The Minstrel in Batman '66 Season Five Ideas

Score: +2

Jonathan Harris

as Doctor Darrk in Batman '66 Season Five Ideas

Score: +1

Andy Devine

as Rico Marinara in Batman '66 Season Five Ideas

Score: +1

Maurice Evans

as The Puzzler in Batman '66 Season Five Ideas

Score: +1

William Shatner

as Two Face in Batman '66 Season Five Ideas

Score: +1

John Astin

as Cluemaster in Batman '66 Season Five Ideas

Score: +1

Andy Griffith

as Signalman in Batman '66 Season Five Ideas

Score: +1

Vincent Price

as Egghead in Batman '66 Season Five Ideas

Score: +1

Victor Buono

as King Tut in Batman '66 Season Five Ideas

Score: +1

Ethel Merman

as Lola Lasagne in Batman '66 Season Five Ideas

Score: +1

Goldie Hawn

as Harley Quinn in Batman '66 Season Five Ideas

Score: +1

Dean Martin

as Cupid in Batman '66 Season Five Ideas

Score: +1

Victor Borge

as The Great Dane in Batman '66 Season Five Ideas

Score: +1

Carolyn Jones

as Marsha, Queen of Diamonds in Batman '66 Season Five Ideas

Score: +1

Anthony Perkins

as The Scarecrow in Batman '66 Season Five Ideas

Score: +1

Estelle Winwood

as Aunt Hilda in Batman '66 Season Five Ideas

Score: +1

George Reeves

as Clark Kent in Batman '66 meets Superman '55

Score: +1