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The family debuted as shorts on The Tracey Ullman Show on April 19, 1987. After a three-season run, the sketch was developed into a half-hour prime time show called The Simpsons, which debuted on December 17, 1989. The show was an early hit for Fox, becoming the first Fox series to land in the top 30 ratings in a season (1990).
There are actually a few qualifiers on the various run-length records set by The Simpsons, but the two challengers most often cited are The Flintstones and Scooby-Doo.. The Simpsons was named the longest running prime-time animated series in 1997 after airing its 167th episode, surpassing The Flintstones.. In 2006, it surpassed Scooby-Doo as the longest running animated series at any hour.