During his appearance on 'The Late Show With David Letterman,' Conan O'Brien joked that he had been told the two hosts would be discussing their "shared love of antiquing" and their "many wonderful vacations together."

Fat chance on that.

The two late-night hosts hadn't sat down with each other on-air since Conan was pushed out at NBC in 2010 after Jay Leno returned to 'The Tonight Show' chair that Conan had been briefly given the job. Or, as Dave referred to it, "the felony."

Watch Conan show Dave the proper way to make fun of Jay Leno's high-pitched voice.

Of course, Letterman has his own gripes with Jay. He feels Leno acted disingenuously when they were both at NBC, and his deception was part of the reason why he, and not Letterman, ended up taking over for Johnny Carson on the Tonight Show back in 1992.

In fact, during his interview with Conan, Letterman called the period of time in which Conan was pushed out -- and Jay was getting all sorts of blowback -- "the golden age of television."

Conan took no real offense in Letterman's glee about events that including him more or less getting fired, because, at the end of the day, it exposed Leno as the backstabber both Conan and Letterman believe him to be. See more of the interview below.

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