UPDATE with more details on the show: Bill Murray popped out of a cake and led a friendly protest outside the Ed Sullivan Theater with pedestrians, singing “All we are saying, is more Worldwide Pants” to the tune of “Give Peace A Chance,” in hopes of changing Dave Letterman’s mind about retirement last night. Murray is Dave’s final announced guest as host of his late-night TV program; tonight’s finale plans are being kept under wraps.

Not coincidentally, Murray also was Dave’s very first guest when Letterman made his broadcast TV late-night hosting debut on NBC’s Late Night, back in February of 1982. Murray made good on his threat to Dave back then to “make every second of your life from this moment on a living hell,” smearing Letterman and his snappy suit in a cake-infused hug (Letterman changed suits after Murray headed out to protest).

Murray famously also was Letterman’s first Late Show guest when Dave moved to CBS in 1993 after NBC anointed Jay Leno as Johnny Carson’s Tonight Show successor. Murray has been among Dave’s most frequent guests – unlike Bob Dylan, who made his first TV appearance in two decades on the show to send Dave off with the ’40s Frank Sinatra hit “The Night We Called It A Day.”