'The Simpsons' 600th Episode Celebration Previews VR Couch Gag

James L. Brooks can recall the exact moment he realized "The Simpsons" had become a pop culture phenom. "It was 27 years ago and some magazine like 'Satellite News' put us on the cover," recalled Brooks, one of the show's co-creators. "I said, 'Oh my God, we're on the cover!' And put it on my...