It was twenty-five years ago tonight that the late great Johnny Carson hosted his last episode of “The Tonight Show.” His guests that night were Robin Williams and Bette Midler. Carson had been the host of The Tonight Show for thirty years. By the 1970’s he was an American institution. The Tonight Show was already successful when he took over- the first two hosts were Steve Allen and Jack Paar but Carson took it to another level which hasn’t been touched since he left. When Carson retired he pretty much did just that. He died in 2005 at the age of 79.