OG Upright Citizens Amy Poehler, Matt Besser, Ian Roberts, and Matt Walsh lead the UCB's ASSSSCAT team on a month's worth of long-form improv hijinx. The show is known for its special guests, and with the Writers Guild strike still in full swing, there's no better time than now to catch guest performers from SNL, The Daily Show, and Conan O'Brien — after all, they certainly have their weekends free.