Re: 7X03 A Town Called Mercy (Grading/Discussion) (SPOILERS!)
Bleeding cool noticed that the title sequence is gradually getting darker. Glad it's on purpose as it was starting look like someone was playing with the contrast too much. Another interesting point was the lights flickering as they do in Weeping Angel episodes....
"It's not that you can see the strings, it's that 40 years later you're still looking at them." - Steven Moffat
"This movie was big. Imagine how big it could have been with me in it?" William Shatner