Late Show with David Letterman

Eric Stonestreet; Christopher “Mad Dog” Russo; Brandon Bennett; Norman, the Bicycle-Riding Dog (20x20)

Air date: Feb 05, 2013

From "Modern Family", actor Eric Stonestreet; Trick: Norman will ride a scooter; from Sirius XM Radio, Chris "Mad Dog" Russo; a performance by Elvis tribute artist Brandon Bennett.