`The Simpsons’ through the years
`THE SIMPSONS’
THROUGH THE YEARS
Debut: April 1987 as part of “The Tracey Ullman Show.”
Series debut: December 1989.
Total seasons: 18
Total episodes: 400
Historical status: Longest-
running comedy in TV history; longest-running primetime entertainment show still on the air.
First film: “The Simpsons” opens July 27.
Tonight: The series’ 399th episode, a spoof of “24,” airs at 8 (Chs. 2, 35) with the 400th installment at 8:30.