The Late Show with Stephen Colbert Season 3 Benedict Cumberbatch, Mary Gallagher Season 3, episode 143 Benedict Cumberbatch, Mary Gallagher May 18, 2018 45 min Actor Benedict Cumberbatch; stand-up comedy performance by Mary Gallagher Previous episode Jake Tapper, Liam Payne featuring J. Balvin Next episode Zachary Quinto, Vanessa Bayer, Dean Baquet