Does anyone know where I can download a copy?

It's the only one I haven't got. And I just don't feel right watching the finale without watching that episode first. You know?

I think it's the completest in me or something.

 :) It's been weeks since I have had a chance to watch. And I end up watching the finale. Eeeps!
Okay so I'm not really going to put spoilers in this post. So...er...what did I miss?