THE BOYS SURPRISE LEONARD BY TAKING HIM TO MEXICO FOR A BELATED BACHELOR PARTY, ON “THE BIG BANG THEORY,” MONDAY, OCT. 5

Keith Carradine Returns as Penny’s Father, Wyatt

 “The Bachelor Party Corrosion” – The guys’ science skills are put to the test when they get a flat tire during Leonard’s bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard, on THE BIG BANG THEORY, Monday, Oct. 5 (8:00-8:31 PM, ET/PT), on the CBS Television Network.