It's not Colbert's sense of irony or his political commentary that set him apart from the late-night pack, but his ability to be candid, clear-eyed and emotionally direct when the moment called for it.

From celebrity guests to the last episode, here’s what’s ahead as CBS’ long-running “The Late Show” comes to an end.

As Stephen Colbert signs off May 21, his exit closes a 33-year CBS franchise—and marks the end of one late-night era built on ritual, the desk and the band