I could name a lot but will say one I bet nobody else will say or will agree with:

I really loved the "This is Us" episodes dealing with the Vietnam war with Jack's brother Nickie being drafted, Jack goes to look for him and what happened that traumatized Nickie.

There is a moment when Jack finds Nickie, and Nickie turns around and the actor his this amazing haunted look on his face.

They also showed something I remember as a kid and never saw dramatized since then which was how the draft lottery numbers were televised to the nation. The show got that just right.