Bill Hader continues to have a flourishing career after his most famous gig as a regular cast member on SNL. He impressed the audiences with shows like Barry and Documentary Now!. However, many fans don’t immediately connect him to South Park, the long-running Comedy Central satirical show. Hader joined the writing room of the series several times.

Fans who have seen the documentary 6 Days to Air: The Making of South Park would’ve learned that Hader was a producer on the series. Trey Parker and Matt Stone invited him to their small and insular writing staff on several episodes. It means that many of our favorite South Park episodes had the brilliance of Hader in them.

Bill Hader plays the titular character of Barry Berkman in Barry | Credits: HBO

Hader and Stone first met when the former was filming Forgetting Sarah Marshall in LA. They struck up a friendship at that time,...