The secret word is ""flange""; Dave holds up a certificate that makes Late Show the ""Official Late Night Talk Show of the Millennium""; Biff annoys Yankees players during his 2nd annual trip to their Spring Training camp in Florida; Lyle Lovett and Willie Nelson, with a little help from Kris Kristofferson, perform a memorable duet.
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Ready to Watch Late Show with David Letterman, Season 6, Episode 129?