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Dave shows the woman/duck and "rabid dingo" clips yet again; Dave discusses the new theory that a meteorite may prove life on Mars, prompting Alan Kalter to go berserk with conspiracy theories; Emmylou Harris, Gillian Welch, Alison Krauss and Dan Timinski and the Soggy Bottom Boys perform a medley of songs from the film O Brother, Where Art Thou?
First Air Date : Aug 30, 1993
Last Air date : May 20, 2015
Episode : 4252 Episode
Season : 22 Season
Runtime: 63:60 minutes
Studio: CBS
Country: United States of America
Crew: David Letterman (Writer)