Gerard Mulligan as Batman on Letterman, June 13, 1989 

By request. Gerry comes on the show to help promote the soon-to-be-released "Batman."
Preceded by Dave's update on Emerson Fittipaldi's journey to the show. He never shows up by the end of the taping, so Connie Chung stands by in the green room to take his place. Emerson finally appears the following night.
Note: Gerard's first portrayal of Batman here: • Viewer Mail on Letterm...