Comedy Central has delayed the airing of tonight’s episode of South Park, with co-creators Trey Parker and Matt Stone taking full responsibility for the delay. They wrote in a statement that they were “super stressed” about not meeting their deadline. The show is now set to air next Wednesday, September 24.
Source: https://www.ign.com/articles/this-ones-on-us-we-didnt-get-it-done-in-time-south-park-creators-delay-new-episode-hours-before-it-was-due-to-air