This hilarious thrill ride will knock you off your feet as Australian comedian Rove McManus and seven accomplished comics join RIOT. Each week, special celebrity guest stars also will be featured. Confirmed guest stars include Carell, Jason Alexander ("Seinfeld"), D.L. Hughley ("The Original Kings of Comedy"), Cheryl Hines ("Suburgatory"), Tom Green ("Tom Green Live"), Chris Kattan ("Saturday Night Live"), Mayim Bialik ("The Big Bang Theory"), David Arquette ("Pushing Daisies," "Never Been Kissed"), Oscar Nunez ("The Office"), Andy Dick ("The Andy Dick Show'), Orlando Jones (SLEEPY HOLLOW, "MADtv"), Nicole Sullivan ("Cougar Town"), Michael Ian Black ("Burning Love"), Will Sasso ("The Three Stooges"), Andy Buckley ("The Office") and Rob Delaney ("Key and Peele").