Stephen Colbert's tenure as host of "The Late Show" ends May 21, and the CBS late-night institution is going out with nostalgic fanfare. David Letterman, Colbert's predecessor who hosted the program for 33 years before stepping down in 2015, returned to the Ed Sullivan Theater to participate in a segment where iconic set pieces from the show's history launched off the CBS logo in a final week celebration.

The bit plays into late-night television's inherent self-referentiality and Colbert's tenure as one of the medium's sharpest satirists. Since taking over from Letterman in 2015, Colbert has built "The Late Show" into a ratings powerhouse, particularly during the Trump administration when his opening monologues became appointment viewing for politically engaged audiences. His show balances celebrity interviews, musical performances, and comedy bits with the kind of topical commentary that made his earlier "Colbert Report" a cable news fixture.

Letterman's return carries symbolic weight. The legendary host shaped late-night television for three decades, pioneering the irreverent, often absurdist comedy style that Colbert inherited and evolved. The segment linking these two eras visually and narratively underscores how "The Late Show" has remained a cultural anchor for CBS, even as streaming platforms have fragmentmented late-night viewership.

Colbert's exit from the daily grind of late-night reflects broader industry shifts. The format demands relentless topical commentary and nightly interviews that few broadcasters still consider essential infrastructure. His final week will likely draw nostalgia-driven audiences alongside the show's core viewership, creating a ratings moment for CBS that the network will milk for every drop of prestige.

The question now centers on succession. CBS has not yet announced who will replace Colbert, leaving the future of