A power outage at South Park Studios Tuesday night prevented the crew from finishing tonight's planned episode, according a press release on the show's site.
This marks the first time in the series' 16-season history the creators missed a deadline to hand in a finalized episode before air time.
"From animation to rendering to editing and sound, all of our computers were down for hours and we were unable to finish episode 1704 "Goth Kids 3: Dawn of the Posers" in time for air tonight."
The South Park crew is known to be on a ridiculously tight schedule.
Typically, the creators make an entire episode of the series in under a week.
"It sucks to miss an air date," said co-creator Trey Parker in the release. "But after all these years of tempting fate by delivering the show last minute, I guess it was bound to happen."
Instead, viewers can tune into an encore, live-tweeted presentation of popular episode "Scott Tenorman Must Die" at 10 p.m.