You probably already figured it out by now as i am answering 10 months after you asked - just saw your question :) Youtube has a lot of clips. or just download the whole epi from for example Casttv.com.
the moviemaking software will allow you to trim down to just the clip you want to keep. But you will probably have to format the video first, i use formatfactory which i downloaded for free.
Any questions let me know.
