Instagram/Stephen Colbert & Jimmy K Celebrity Late-night rivals unite as Kimmel, Fallon go dark for Stephen Colbert's final show on May 21-a landmark farewell of mutual respect. May 13, 2026 AceShowbiz - The late-night world will take a brief pause on May 21 as Stephen Colbert prepares to air his final episode of The Late Show with Stephen Colbert. In a rare show of unity, both Jimmy Kimmel Live! and The Tonight Show Starring Jimmy Fallon will go dark that night, allowing Colbert to have the spotlight all to himself.