Tony-winning actor Paul Sand joins Gilbert and Frank to discuss the birth of improv comedy and the early days of Second City and shares his memories of working with Carol Burnett, Sid Caesar, Mary Tyler Moore, Zero Mostel and Barbara Streisand. Also, Judy Garland beats a retreat, Marcel Marceau joins the French Resistance, Paul tries on Harpo Marx's wig and a teenage Gilbert watches the filming of "The Hot Rock." PLUS: Elaine May! "The Mad Show"! Praising Valerie Harper! The genius of William Goldman! And Paul stars in a memorable episode of "Curb Your Enthusiasm"!Learn more about your ad choices. Visit megaphone.fm/adchoices