Justin Theroux joins the Netflix series Maniac alongside Emma Stone and Jonah Hill Justin Theroux (The Leftovers) has been cast in the upcoming 10-episode Netflix series Maniac, according to Deadline. He’ll join Emma Stone (La La Land) and Jonah Hill (21 Jump Street) in the dark comedy series. Cary Fukunaga (Beasts of No Nation) is set to direct all of the episodes, and the show was written by Patrick Somerville.