From Milton Berle to 'SNL' to 'American Idol,' here's how live TV has evolved over the years
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The only surprising thing about "30 Rock" — created by and starring a former "SNL" head writer and Weekend Update host in Tina Fey, and featuring "SNL" alum Tracy Morgan and frequent "SNL" host Alec Baldwin in its main cast — doing a live episode is that it took until the fifth season to try it. The first attempt was, unfortunately, reminiscent of the "ER" live episode, in the way it stripped away a lot of what made "30 Rock" work. When they tried it again a season later, they wisely turned it into what was essentially an all-star version of "SNL" in primetime, with a collection of sketches about the history of TV that included Jon Hamm in blackface, Brian Williams as a sexist news anchor, Donald Glover as a young Tracy, etc.