1. 'Monty Python's Flying Circus' (1969-1974)
"I was frustrated by the tyranny of the punchline," John Cleese recalled in the book Monty Python Speaks. "Surreal things would be suggested, writers would laugh, and then [a producer] would say, 'Yes, but they won't understand that in Bradford.'" It's impossible to underestimate the impact that Monty Python's Flying Circus would have on a generation of comedians: Sketches might stream into each other or suddenly give way to a cartoon. Huge arguments over dead parrots, a cheese shop's inventory or whether two people were having an argument could escalate into dizzying wordplay. Silliness reigned supreme. As veterans of earlier sketch shows, each of the Pythons knew the form well enough to shatter and reconfigure the format. As phrases such as "nudge, nudge" became a nerd lingua franca, Flying Circus proved that something completely different could, in fact, translate worldwide. "There's not one minute of it that seems dated," novelist Dave Eggers said about the show in 2004. "Their stuff is a lot more sweeping and lasting than almost anything else, because they weren't taking on current events — they were addressing history itself. History and sheep."