This documentary is a portrait of the generation of the mid-century Jewish comics that includes Jerry Lewis, Sid Caesar, Jackie Mason, Mort Sahl, and Jerry Stiller, who appear telling jokes and telling their stories. And it is the story of the culture that produced them, starting in upstate New York’s Catskill Mountains, aka the Borscht Belt (think “Dirty Dancing”), where Jewish immigrants transformed lush farmland into the 20th century’s largest resort complex. Those Catskill hotels and bungalow colonies provided the setting for a remarkable group of young Jewish-American comedians to hone their craft and become worldwide legends.