Since its modest beginning in 1959, The Second City in Chicago has become a world-renowned bastion of hilarity. A training ground for many of today's top comedic talents--including Alan Arkin, Dan Aykroyd, Stephen Colbert, Tina Fey, Bill Murray, and Amy Sedaris-- it was an early blueprint for improv-based sketch revues in North America and abroad. Its immeasurable influence also extends to television, film, and the Broadway stage. Mike Thomas interviewed...