This can happen with heavy traffic but not all the time. Does it suddenly start buffering again or half way through does it time out suddenly. If it is #1 click the real player icon on the bottom and choose option play in real player or theater mode. this will allow yo to see how much of the episode has loaded. I would even recommend hitting pause when it starts then go make a cup of tea before you watch. If it does not seem to load I recomend you reinstall realplayer. If the #2 is happening I recommend full virus scan of your computer.