Stephen Colbert’s best ‘Late Show’ finale moments, celebrity cameos & more! 

Stephen Colbert went out with a bang hosting his final episode of “The Late Show” on Thursday, May 21. The comedian had a slew of surprise guests: Bryan Cranston, Paul Rudd, Tim Meadows, Tig Notaro, Ryan Reynolds, Neil deGrasse Tyson, Elijah Wood, Elvis Costello — and his final interview was Paul McCartney. Plus, find out...