David Letterman, then a regular on variety show Mary, kayaked for CBS in 1978's Battle of the Network Stars, a show THR lauded for capturing "the high-spirited atmosphere and intense competitiveness." Bob Grant/Fotos International/Getty Images Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment Competition among the original big three networks seems natural, but what happens when you bring that rivalry to life on a playing field with a...