The Tale of the Ghastly Grinner Are You Afraid of the Dark? : Season 4 Episode 9

Ethan wants to be a comic book artist, but his submissions are constantly rejected by companies. One day, he's invited to a comic shop, where he gets the only copy of the comic ""The Ghastly Grinner."" He accidentally brings the supervillain to life and it starts turning everyone into giggling mindless idiots.