Late Show with David Letterman

Season 15, Episode 47

Episode Title: Diane Keaton, Jim Gaffigan

Air Date: 2008-01-18

Overview:

Dave begs Gaines to stop feeding in phone calls from the California Highway Patrol, which interrupts the show three times. Also, in her first Letterman appearance in two decades, Diane Keaton kisses Dave and admits to being astounded by her costars in the movie Mad Money.