Del Close is a cornerstone, a legend in improvisational theater. Check out Del’s Wikipedia entry for his history.
This video explains Del Close and his creation: The Harold. The Harold is a long form improvisational theater format that features monologue, two person and group scenes that sort of create a three act play on the fly.
I love to improvise and the Harold is great form to play with. Sea Tea Improv offers a weekly Hanging with Harold workshop at their Hartford Studio on Wednesdays. Upright Citizen’s Brigade founder Matt Besser said “You’ll have to do about a hundred Harolds to start feeling comfortable with the form.” I hope to get there.
Here’s a great poster created by illustrator and improvisor Dyna Moe that illustrates The Harold.