Junior developing dementia and not being able to remember anything about Tony, my grandfather went through a similar phase before he passed away, so it really hit home for me.
Adriana's death was also really hard to watch, her being killed off-screen made me hope against odds that she would return the following season.
Uncle Junior having a total breakdown at the funeral in "In Camelot". Dominic Chianese has so much goddamn soul, and he took it to such a dark place in that scene. Amazing.
Taps, lights out, 2200 hours. What's missing? Give up? Television.