Over in the land of 'Watches' the review for 'The Caves of Androzani' is up.
There is a lack of spoilers (and links to the episode) below.
Since the BBC won't let me embed the videos here's links to all of the Caves of Androzani episodes for your viewing pleasure.
Episode 1
Episode 2
Episode 3
Episode 4
EDIT:
If the above don't work, here's some links blatantly stolen from maccyAkaMatthew's post.
http://www.blinkbox.com/TV/Series/343/Doctor-Who-...
http://www.youtube.com/show?p=Ps0e32nFzs0&s=2...
http://www.seesaw.com/TV/Drama/p-10027-Episode-1
http://video.uk.msn.com/search/caves%20of%20andro...
And as I can't let a post go by without embedding something, here's a tribute video for Five that I rather liked. (Mostly for the music. Our fish need more Reel Big Fish in their lives.)