Using the Harold, an improvised story-telling format, iO's rockstar house teams will showcase the wonderful, strange, and thrilling art of Improv, making you second-guess if what you're seeing is truly made up on-the-spot.

Chicago's longest-running Harold team returns to iO to bring their unique blend of chaos and creativity to iO's signature form The Harold melding games, songs, and scenes for singular, edge-of-your-seat improv comedy.

Chicago's Longest Running Improv Comedy Show! Each week, actors will improvise a two act show based on the stories and monologues of a special guest host. This show was invented at iO in 1995 and has been running ever since.

Come be a part of Chicago's most spoiled audience as you are treated to a free performance from iO's premiere long form ensembles: Dumb John, Birdlady, and a special guest team each week. FREE!