Others, however, find it endearing—a ghost in the machine that connects modern animation to the chaotic, low-budget origins of The Tracey Ullman Show shorts.
The most cited episode is (Season 20, Episode 8, originally aired November 30, 2008). During a classroom scene at Springfield Elementary, observant viewers who paused their DVRs or DVD copies spotted what looked like a typesetting glitch—a jagged, pixelated patch of text that read roughly “dthrip” near the edge of a character’s desk or background poster.
Airing from September 2008 to May 2009, Season 20 delivered several experimental and fan-favorite storylines: Top 10 Simpsons Season 20 Episodes