Stream once and destroy: 20 great TV episodes too painful to watch twice

The prevalence of streaming video encourages television fans to re-watch their favorite episodes, poring over them for subtleties and Easter eggs they missed the first time through. But that isn’t always an option with episodes too emotionally bruising, too gory, or too awkward to watch a second time. These episodes often represent shows at the height of their storytelling power, but having a huge impact on the audience can be a blessing and a curse. The more indelible the episode, the less pressing the urge to revisit it.
Spoilers ahead, but all for episodes that aired years ago.