A good show (or movie, for that matter) can stick with you for months, years, and even decades after you first watch it. In fact, when a show comes to an end, or a character gets killed off, or a movie series finally ends, it can be tough to say goodbye to the characters you've grown to love.
Which is why seeing cast reunions years later is always so much fun. Here are some times when celeb costars gave the fans what they wanted.