High Quality Content by WIKIPEDIA articles! "The Lastest Gun in the West" is the twelfth episode of The Simpsons’ thirteenth season. It first aired on the Fox network on February 24, 2002. In the episode, Bart, after being chased by a vicious dog, runs into a retired Western star named Buck McCoy, who soon becomes Bart`s idol. After McCoy shows the Simpsons some of the films he starred in, the family decides to help him get back into acting.