Television doesn't owe permanence. A star might headline the posters, but the story may quietly outgrow them. Sometimes, a new voice takes the lead, or the center just blurs.

Sticking the landing is one of television’s toughest challenges. When finales work, they become legendary. When they don’t, they spark outrage, think pieces, and endless rewatches fueled by disbelief. These are the TV finales that made bold, baffling, or polarizing decisions—and ensured they’d never stop being debated.

Whether it’s a beloved sitcom cast, an iconic drama crew, or a long-awaited revival episode, television reunions offer some of the best nostalgia, closure, and emotional payoff on TV. These moments bring characters back together on screen, often years after viewers last saw them, reminding us why those relationships mattered so much in the first place. Here are 20 of the most legendary TV reunions ever aired.