In this improvisational comedy competition, four plucky guest stars must walk into a live comedy sketch about which they know nothing beyond the costumes they have been given. Their task? Improvise their way through the sketch with the other actors onstage until a judge mercifully sounds a horn. In each sketch, the guest's entry is greeted by another actor saying, ``Thank God you're here!'' The guest proclaimed the winner by judge Dave Foley takes home a cheap trophy -- and, of course, bragging rights.