What is a perfect episode of television?

I watched the penultimate episode of "This Is Us" last night, and it was... perfect. Beautifully shot, beautifully written, wonderfully acted. Just... perfect. I was a puddle of tears from 5 minutes in until the very last frame. What is a television episode that you would make ZERO changes to? (The pilot of "Desperate Housewives" and the bomb episode of "Grey's Anatomy" also fall in line of flawless TV for me)