Look back to the Batman (1966-1968) TV series and some of the guest stars they had on the show: Burgess Meredith, Cesar Romero, Vincent Price, Cliff Robertson, Eartha Kitt, Milton Berele, Rudy Vallee, Glynis Johns, Ethel Merman, Dina Merrill, Howard Duff, Roddy McDowall, Van Johnson, Art Carney, Otto Preminger, Liberace, Eli Wallach, John Astin, Tallulah Bankhead, Joan Collins, Jill St. John, Phyllis Douglas, Shelly Winters, Zsa Zsa Gabor, Ted Cassidy, Jerry Lewis, Phyllis Diller, Andy Devine, Sammy Davis Jr., Sam Jaffe, Allen Ludden, Gypsy Rose Lee, Steve Allen, Dick Clark, Bill Dana, Don Ho, Chet Huntley, Edward G. Robinson, George Raft, Art Linkletter, and Henny Youngman. Frank Sinatra, Natalie Wood, and Cary Grant were also fans of the show and tried to get on, but producers were unable to come up with the right roles for them. Robert F. Kennedy was also a fan but couldn't get the details worked out for him to make a cameo as a character named Attorney General. A number of the stars were urged by their children or grandchildren to on the show.
For a very campy superhero show, there was a lot of talent that appeared on it. The list above didn't include actors just getting started like James Brolin, Teri Garr, and Rob Reiner.