One week ahead of the final episode of The Late Show, David Letterman joined Stephen Colbert to commend the end of the late night series.

From the start of his career as a late-night television star on CBS, Stephen Colbert shattered the long-established broadcast network mold for who and what makes a late-night host.

Before their rooftop adventure, Letterman took to the couch to chat with his successor – he arrived to a standing ovation from the audience and the house band’s rendition of the White Stripes’ “Seven ...