Whether Frasier was roasting them or they had stumped Frasier with their dilemmas, many celebrity guest callers helped fuel the show's iconic humor.

The Graham Norton Show’s funniest guest Greg Davies’ reveals what makes the talk show’s humor & chemistry so unforgettable through a hilarious story.

There are so many fantastic late night show hosts, but an exceptional few, from Conan O'Brien to Johnny Carson, rank among the funniest of all time.