Smith has a long history of involvement with superhero projects, from writing comic book titles for both DC and Marvel to penning a version of the script for the ill-fated Nicholas Cage film Superman Lives. Smith also created a new superhero film, Yoga Hosers, for his aptly named daughter Harley Quinn, Johnny Depp, and his daughter, Lily-Rose Depp. Oh, and he also provided the voice of several animated superhero characters, including Hal Jordan in the Duck Dodgers cartoon and M.O.D.O.K for The Marvel Experience, as well as appearing as forensic assistant Jack Kirby in Ben Affleck’s Daredevil film. Not to mention, Smith has his own AMC reality series, Comic Book Men, which is set at his New Jersey-based comic book store.

“I literally got a phone call from his agent saying, ‘Kevin Smith’s favorite show is The Flash‘ and was there an episode for him and the answer was ‘yes.’ It was really that simple,” said executive producer Andrew Kreisberg. “I know what a fan he is. I’m such a huge fan of his work. And it was funny because I just watched The Death of Superman Lives, it was serendipitous having him in my head again. I loved the movie Dogma and the show Reaper too, which he directed the pilot for. And obviously there’s a good deal of publicity that comes with this and as responsible executive producers we have to look at that. But we would never look at that at the expense of our own show. Knowing the scrutiny that the episode is going to be under, I know he’s going to bring it to his fullest.”