Evidently David Letterman still has a lot to say about last January's late-night wars between Jay Leno and Conan O'Brien. Even though Dr. Phil McGraw was on the 'Late Show' (weeknights, 11:35PM ET on CBS) to do the talking, it was the psychologist's question to Letterman about the Leno-O'Brien showdown that made the host so chatty.

Watch the video after the jump. Evidently David Letterman still has a lot to say about last January's late-night wars between Jay Leno and Conan O'Brien. Even though Dr. Phil McGraw was on the 'Late Show' (weeknights, 11:35PM ET on CBS) to do the talking, it was the psychologist's question to Letterman about the Leno-O'Brien showdown that made the host so chatty.

"I love Jay summing the whole thing up: '[in high-pitched voice] Yeah, well we both got screwed.' Yet you're the only one that ended up with a show -- how did you get screwed exactly?" Letterman said.

And he was just getting started. Letterman went on to say Leno deserved the bum rap he had received. "You can't not love [Leno], but then there's also this other side of him... where he's just a complete boob."