1960s Batman star Burt Ward joins Arrowverse's "Crisis on Infinite Earths" crossover

TheWrap

“We’re currently working on the crossover,” Batwoman executive producer Caroline Dries said during a Comic-Con panel. “We’ve got a ton, a ton, a ton of characters coming into the five-part event… Burt Ward will be making an appearance in 'Crisis on Infinite Earths.'” Dries wouldn't reveal Ward's role. The actor is famous for playing Robin on the 1960s Batman TV series.