I just used mininova's RSS for Top Gear
http://www.mininova.org/rss.xml?sub=224
IIRC for the current version of uTorrent the filter is perl compatible so narf's filter suggestion should work.
OTOH the built in filters are pretty easy to use, so that's what I went with. Just select your desired quality (720P for me) and episodes (14x01-). I suppose it's all right to leave * as the filter since all the stuff that goes into that feed will have already contain ^top.?gear.
If you only want to download FinalGear's upload, do it this way...
http://www.mininova.org/rss.xml?user=FinalGear
That is filtering all results on Mininova, uploaded by 'user' (FinalGear).
However, I'm having quite a few issues trying to download only the HD rips.