Even writing about it now is hard. The show pulled off a "fake-out" death in Season 3, but Season 4 made it real. The montage of M’gann screaming across the psychic link, Artemis collapsing, and the silent funeral... it rivals The Tower of Babel or The Death of Superman for pure emotional devastation. Young Justice proved it can still punch you in the gut harder than any live-action show.
While everyone got their time in the spotlight, a few arcs stood out as masterclasses in superhero storytelling. The Tragedy of Superboy young justice season 4