The Late Show with Stephen Colbert Season 4 Tiffany Haddish, Iain Armitage Season 4, episode 12 Tiffany Haddish, Iain Armitage September 20, 2018 45 min Stephen welcomes actress Tiffany Haddish and actor Iain Armitage. Previous episode Jane Fonda, Willie Nelson Next episode Hillary Rodham Clinton, Nik Dodani