PBS airdate Wednesday July 1, 2009 at 9pm ET (check local listings) http://www.pbs.org/wnet/americanmasters/episodes/garrison-keillor/the-man-on-the-radio-in-the-red-shoes/1159/ A rhubarb farmer explains where he gets his crop, and how many pies he can make with it. This episode of AMERICAN MASTERS follows America's foremost humorist and social pundit, Garrison Keillor, as the showman takes his skits and monologues across the country in his popular radio show, A Prairie Home Companion. For more information visit http://www.pbs.org/wnet/americanmasters/episodes/garrison-keillor/the-man-on-the-radio-in-the-red-shoes/1159/.