Hosted by comedian Aisha Tyler, cast members Ryan Stiles, WayneBrady and Colin Mochrie, along with guest comedian Greg Proops, put their comedic skills to thetest through a series of spontaneous improv games that are prompted only by random ideassupplied by the studio audience. The four performers must use the little information they have andtheir wild imaginations to depict different characters and an array of scenes, as well as performsongs.