This episode has to be one of the best of the entire series. From start to finish it is a roller coaster ride of fun, adventure, thrills and suspense.
David is very clever in this episode with the way he finds the key to get out of the house and avoid being killed by the hunter.
I also like the fact that David always checks everything he touches and does. This of course saves him from being blown up in the end. The other people in the photo's were not so lucky.
A classic episode in every sense of the word.