I thought the monsters in Doctor Who today were particularly creepy today. I won't say anything more about that. “Spoilers”, as Doctor Song would say. I didn't realize that Elisabeth Sladen, the actress who played Sarah Jane Smith, passed away until I saw the episode had been dedicated to her. I remember her from when I watched Doctor Who when we first moved to the America, as well as her appearances during the tenth Doctor's tenure. Seems as though I was not the only one who found her memorable.
The producers of the show are obviously trying to appeal to American audiences now. Beyond the fact that this episode was filmed in part on location in the US for the first time in the shows rather lengthy history, it was released in the UK, US and Canada at the same time. Australian audiences who don't download it from the Internet have to wait a whole week to see it. WTF BBC? Americans start to get a little interested in the Doctor and you rearrange everything. Doctor Who has always been big in Australia! Of course part of the reason they are airing it at the same time on both sides of the Atlantic is to reduce the number of people who download it from BitTorrent, so that they can sell ads on the BBCA version and at the same time air it ad free in the UK where people pay the BBC tax.