Ladies and gentlemen, my guest tonight certainly needs no introduction, Colbert said as he introduced Letterman.
hey welcome back to the Ed Sullivan Theater Mr. David Letterman.
Letterman said as the audience continued to cheer him.

What are they doing now?
The audience only got louder and Letterman said, Is there going to be trouble?
At one point Letterman looked at his watch following his extended welcome.
As Letterman took a seat he asked Colbert to control your people.
It was Lettermans first time back on theCBSlate-night show since leaving in May 2015 after 23 years.
Since his exit, Letterman has been hosting an interview series on Netflix titledMy Next Guest Needs No Introduction.
Watch Lettermans entrance in the video posted above.