In case you missed the preview last week, it's worth knowing that Jennifer Garner makes her directorial debut with this episode--apparently after being bugged by J.J. for a couple of years to give directing a shot. Victor Garber is already on the record as being a fan of her work behind the camera in this ep, so I'm looking forward to seeing the result.
Oh, yeah--I imagine there'll be some important plot-type stuff too, being that we're winding down to the last few episodes and all.
The Doctor: River Song, I could bloody kiss you! River: Oh well. Maybe when you're older.
The Doctor: Can I trust you, River Song? River: If you like. But where's the fun in that?