For any TV show, reaching Episode 100 is a major hallmark, especially with how spread out audiences are these days. The Flash's cast and crew have been promoting their own 100th episode since San Diego Comic-Con, when it was revealed that star Tom Cavanagh would be directing. Thanks to former (voice) star Tony Todd, we know that Cavanagh will be directing scenes with Zoom and more devious speedsters from Barry's rogues gallery.