I have said before that I don't think it's actually possible to produce a bad arrangement of the Doctor Who theme tune. Incompetent maybe but not actually unpleasant to listen to.
This version played by one person on a cello may actually be one of my favorites. Which surprised me, because I really wasn't sure how well it would translate. Admittedly it doesn't sound as alien as some of the versions have, but it does really bring out the melody.