"When Late Night's Avengers Unite – A Historic Moment on The Late Show! Late-night television just had its most iconic crossover ever. Jimmy Fallon, Seth Meyers, John Oliver, and Jon Stewart all appeared on The Late Show with Stephen Colbert in an unforgettable moment of unity and laughter. These five comedy titans came together not to compete, but to be united, to have fun. Stephen Colbert has been a staple of political satire and cultural commentary for years. When challenges arose or tensions