This was the first audio play I ever heard, years ago. I didn't immediately fall in love with this format but I have warmed to it considerably since. However my opinion of this play has not changed at all, despite having now listened to it three times.
This is a dark, atmospheric and arresting tale of a gothic house, a sinister force and the nature of evil. It was quite scary when I first listened to it on my own in the dark! I love Sylvester McCoy's dark portrayal of the doctor as we saw in the last season of original doctor who on tv. But two things let this play down and prevent it from being truly excellent.
Firstly, although Sylvester's in-character narration of the main events is wonderful, the odd interspersions of the main proceedings with his conversations with the assassin seem too artificial. They remind me of an exaggerated theatre performance and detract from the otherwise convincing performances in evidence here.
Secondly, the wonderful build up is eventually let down by the explanations at the end which go on far too long and the secondary story from the doctors past is odd and less interesting. To put this another way, the initial set-up is brilliantly well-executed, but when the true nature of everything is unveiled instead of heightening and adding further depth to the drama, it somehow lessens the impact.
In conclusion, this is not the best `Big Finish' audio but it is well worth purchasing, especially if you liked that final season of the original doctor who tv series.