That companion thing annoyed me - it would've been so easy to slip in Ace or, hell, even Sarah Jane who the kiddies know already. RTD must've had an attack of nerves or something.
The very very unsubtle appearance of Rose annoyed me too. I liked the subtle ones - The Poison Sky's blink-and-you'll-miss-it and Forest of the Dead's picture on the wall of a blonde girl and a big wolf - but even the Doctor went out-of-focus in this cameo.
I did enjoy the episode though. Something very different, but yes, a few too many stereotypes. I loved the ending though, very downbeat.
And now we come to the final three-parter. Wow these series shoot by quick!