Doctor Who Series Six Filming - Cardiff Bay - 18/10/2010 - River's Stunt...

Mark Sheppard: Stop! Don't move!
River: There are loads of them. They're everywhere.
Mark Sheppard: America is being invaded!
River: America was invaded a long time ago, America is occupied.
(River moves back a little more)
Mark Sheppard: Don't move! There's no way out!
River: Oh really?