Advice please

I missed last week’s Doctor Who since I was in Albania, and we forgot to video it. So I’ve downloaded a file from BitTorrent with the intimidating filename doctor_who_2005.1×04.aliens_of_london.ws_pdtv_xvid-fov.avi.torrent – and now I find I cannot play it. Or at least, I can play the audio but not the video bits. I’ve never used BitTorrent before, and have now reached the end of my googling abilities (basically downloading various media players that claim they can play xvid files, and then finding that they won’t play this one). Anyone out there know how I can do it?