Late-night host Conan O’Brien called Robin Williams “the best talk show guest in the world” Tuesday – and he was probably right.

"Superstar: Robin Williams" traces his rise from his early stand-up days to his worldwide acclaim as a movie star.

See how Robin Williams' 'lightning' stand-up helped him make his mark as a comedian in the 1970s. "The Tasmanian Devil of stand-up comedy." ...