I had the same problem with a couple of episodes. Explorer would crash whenever I even just opened up the folder. Once, this program called gspot told me there was a codec conflict. I had no idea what that meant, so I just uninstalled all the codecs I had installed, and reinstalled the latest versions I could find. Made everything better. The second time I had the same problem, and did the same thing, but the problem persisted. So, I uninstalled everything, yet again, and then reinstalled codecs from a different site. Once again, everything was made better. I also had a problem with an episode of Naruto that was "jumpy". Once again, reinstalling codecs was the answer. This codec shit is annoying, but it's probably the answer to your question.