Michael Cavna, writing at The Washington Post:
With that in mind, it only seems fitting that “The Simpsons” draws upon both principles to dramatize its act of taking down “Gunsmoke” as the new sheriff of television. On Sunday night, “The Simpsons” will pass the classic midcentury western by airing show No. 636 — the most scripted episodes broadcast by any prime-time series in TV history.