Robin Williams performs along the regular actors on Whose Line Is It Anyway? This is from episode 10 of Season 3, aired on 16/11/00.
Whose Line Is It Anyway? is a short-form improvisational comedy TV show. Originally a British radioprogramme, it moved to television in 1988 as a series made for the UK's Channel 4, for a 10 series run.
American actor and comedian (1951-2014). Did a lot of stand up comedy before moving to perform in many feature films since 1980.