I really don't know why they're bothering to put the Doctor in every story after the first one, it really doesn't allow the series to stand on its own two feet. Had there been one episode with the Doctor, fair enough, but 3 out of 4 is too much. Especially when the titular character could deal with the issues himself. There's some great concepts here, but as with the previous story it loses its way towards the end and the climax just isn't satisfying. I'm also very confused, because the first story clearly ends with the villain being dealt with, but in the following episodes they're going about doing more malicious work, how is this allowed? Its just a tad odd.