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During season three of the acclaimed ABC program “Whose Line Is It Anyway?” the cast of improvisational comedians welcomed the master himself, and provided their audience with one of the finest episodes in the show’s history.

Of all the guests the show saw hit the stage in its nine-year run, there were few who could match Robin Williams’ sheer comedic power and hilarity.

From the beginning of the episode, Williams doesn’t hold anything back, letting his vulgar side seep through, and showing off the arsenal of impressions that helped him become one of the world’s favorite comedians.

A compilation video posted to YouTube in 2009 shows off some of the best moments from Williams’ visit to the show, reminding fans just how funny the late comedian truly was.

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