Doctor Who: The Lodger - Observations, Questions, and Musings

Observations:

Does anyone else think Matt Smith's hair needs a bit of a trim? It was fine last episode, but this week, it could have been the monster of the week. If his hair gets any wilder, I'll begin wondering if it is causing the cracks in time and space. Also, seeing the Doctor in shorts was slightly traumatic. I'm beginning to think that British people shouldn't wear shorts. It just doesn't seem proper. That and he has very very very white legs.

Questions:

What was the rot about? Why was it poisonous? While intriguing, it didn't seem to make sense with the rest of the storyline... but maybe I missed something. Also, the whole bit with the ring in the end. Since Rory was erased not only from memory, but from existence, why is the ring still there? Unless it has something to do with the fact that he left it in the TARDIS... And was he really erased from existence? I mean, that's what I was lead to believe after Flesh and Stone. I think I understand how he can still exist in the Doctor's memory, as he's all time-lordy, and how he was erased from Amy's memory because he existed on her personal timeline... but does his existence in the Doctor's memory mean that he wasn't erased from existence? We haven't really seen any other repercussions of his disappearance, except for Amy noting that she is not the marrying type. What about Amy's Choice and the other episodes in which he played a vital role? Hopefully all will be cleared up next episode, which looks like it is going to be brilliant.

Musings:

Am I the only one who wondered exactly what Amy was thinking at first when she picked up the ring? It wasn't until the crack in time and space started growing that I was almost sure she was trying to remember Rory. At first, I wondered if she thought the Doctor was planning on proposing. Let's hope that cliche scenario isn't planned for next episode, though I think we can be fairly certain it is not.