Instagram/Stephen Colbert & David L Celebrity Stephen Colbert's Late Show finale nears; David Letterman, Strike Force Five, and late-night legends reunite for a historic farewell week. May 9, 2026 AceShowbiz - Stephen Colbert is preparing for the final episode of the Late Show on CBS, scheduled for May 21. In the lead-up to this farewell, the show is set to host a remarkable lineup of late night television's most prominent figures next week.