If you loved comedy, you loved Whose Line Is It Anyway?

The quick-witted cast of Ryan Stiles, Colin Mochrie, and Wayne Brady always left us in stitches. Each game was filled with impressions, characters, and uproarious laughter.

Every episode also featured a fourth comedian who rotated as the episodes went on. From Chip Esten to Brad Sherwood, it was always neat to get that different influence of their comedy style.

But then there were the episodes that featured well-known comedians and let's just say those were the best ones ever.

But without question, one of the absolute best guest stars was the late Robin Williams. His eccentric personality with the best complement to the dry, witty humor the rest of the cast provided.

Watch Robin Williams' "Scenes From a Hat" segment and try not to laugh...I dare you!