That episode had instant awesome as Mark Sheppard (Badger in Firefly, Romo Lampkin in BSG) was playing the FBI dude.
I't will be interesting to see how everything is explained, especially with the doctor at the start.
Rory constantly being portrayed as the idiot out of his depth is a bit old now, as is Pond getting all emotional. It's like watching a teenage girl with hormones out of whack. The crying and emo moment at the start was kind of cringeworthy. It makes me miss the days of Billie Piper/Rose as a companion, least she could handle herself.
The plot was very convoluted (more so than usual) although i suspect this episode is all buld up, interested to see what happens in the next episode.