If you are fan of America's National Pastime, I recommend Episode 7 with special Guest Host Ryan Cole.
Summary:
On April 15, 1947, Jackie Robinson took the field for the Brooklyn Dodgers and broke the color barrier in Major League baseball. However, on May 1, 1884, Moses Fleetwood Walker became the first black man to play in a Major League game before baseball became segregated for the next 63 years. What might have been different if the American Pastime had not become segregated and other African-Americans had followed Walker?
One of my favorite episodes in the early history of the show.