What do think are the most powerful scenes in TV history

I couldn't think of any at first, but the MASH one is great. I remember they didn't give the script to anyone until right before they shot the scene, so as to try an illicit a genuine reaction from the actors before shooting (what are they, amateurs?). The first take was scrapped due to technical difficulties, and the second take is what made it in. They considered shooting it again because of the object falling onto the ground shortly after Radar leaves the room, but elected to keep it.

I'll try to think of some and get back to this.

Those Futurama episodes get you right there. The Lars episode/movie as well as Fry's mom (episode Game of Tomes) also hit hard. I've underestimated how powerful that show can be. Damn near cried just watching that clip again.

The Boy Meets World final scene. It jumps around and the top seems a bit cut off but it's the best quality I could find.

Also from Boy Meets World, when Shawn and Jack's father, Chet, passes. Extra moving since Jack only first met Chet earlier that season.

And finally, from the same show Plays with Squirrels. This is something of an "alternative timeline" scene; everyone moves on, goes their separate ways, and don't maintain the bonds they've formed. The artist formerly known as Eric Matthews comes back and shares his manifesto, showing how things should have been.

I'm sure there are others, including others from other shows, but that's all I could think of right now.

EDIT:

Found another. Roseanne - Aunt Jackie beaten. John Goodman getting his jacket at the end has a lot of power in its own way, and I'm not talking about his bulk.