Fortune: Stephen Colbert was the undisputed late-night talk show ratings king last week … for one night. The rest of the week, NBC’s Jimmy Fallon proved that the new host of CBS’s “The Late Show” still has plenty of ground to make up in the latest installment of TV’s late-night wars. Colbert’s first show attracted 6.5 million viewers. That was more than double the viewership for Fallon’s second-place “The Tonight Show” on NBC. Past Tuesday, though, Fallon’s “Tonight Show” reclaimed the late-night dominance it’s shown for more than a year with the comedian at the helm.