Re: Guy smiling in the background of sickbay *spoilers*
I watched it on the big screen a few times and although the camera isn't focused on him he does seem to be smiling. It really stuck out each time.
"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