David Letterman’s Appearance in a Rare Acting Role on a 1979 Episode of ‘Mork & Mindy’

David Letterman is most known as longtime talk show host, but he also appeared in a few acting roles during his career including on a 1979 Mork & Mindy episode “Mork Goes Erk” where he played the leader of an authoritarian self-help group.

via Pat Kiernan