The Tonight Show Starring Jimmy Fallon Season 4 Demi Lovato, John Cleese Season 4, episode 204 Demi Lovato, John Cleese September 18, 2017 45 min Previous episode Benedict Cumberbatch, Savannah Guthrie, Andy Grammer ft. LunchMoney Lewis Next episode Kevin James, Ilana Glazer, Rudimental ft. James Arthur