Late Show with David Letterman
       
      Late Show with David Letterman
      Show #1554 (8x96)
      
      :  09, 2001
      For the last month or so, a little old man walks onstage during the monologue, stands next to Dave, and walks away.  Tonight, there's a twist: the old guy walks out, and followed soon after by an annoyed-looking Calvert.  Both walk off stage without incident.  Also, during Mailbag, "Police Chief" Bill DeLace gives dating tips, while "Bill Clinton" (Gerard) steals one of the guest chairs.