The movie director noted that David Letterman tried to convince him to film The Colbert Report but never quite succeeded. He wanted to create a documentary about Brian Williams and Robert Plant together. When Chris Columbus recommended putting them together on Stephen Colbert's show, Stewart responded by promising he'd try his best to produce one of the greatest comedians ever to grace television. "That just kept happening," Stewart told BuzzFeed News in October 2015. But then Comedy Central aired Colbert's breakthrough comedy episode — called Jon Stewart Gets Funny — just