“Saturday Night Live” was built with a cast of young no-names performing countercultural comedy. Fifty years later, it is firmly part of the culture, dictating mainstream comedy instead of throwing spitballs from the margins.

What is the best “Saturday Night Live” sketch of all time? Count that among one of life’s many impossible questions. The sketch show’s 50-year history has spawned countless pop culture moments. Sketches like “Wayne’s World” led to entire movie franchises.