Greg Berlanti Talks 'The Flash'/'Arrow' Crossover

Greg Berlanti Talks 'The Flash'/'Arrow' Crossover

Executive Producer Greg Berlanti chats with Access at Comic-Con 2014 about his new CW series, “The Flash.” How does he balance his work on this show with his responsibilities on his other shows, “The Arrow” and “Mysteries of Laura”? Plus, what does he reveal about “The Flash”/“Arrow” crossover?