And these documentaries capture the magic of these electric moments. Given how long "SNL" has been around, it's surprising how few documentaries about the series there are. What's even more surprising is how many of those documentaries have been lost in the era of streaming.

Live” is kicking off its 50th anniversary celebration with a special homecoming concert with singers and performers who have appeared on the show in the past. The concert will take place Friday night live from Radio City Music Hall.