Originally Posted by Matt D

So...

- The control room thing in the tunnels reminded me of the ship in "The Lodger". Was it the same?

- How can Matt Smith's Doctor truly die? Wouldn't that mean that Matt Smith would have to be the last one, & so mean that the Doctor couldn't regenerate again if Smith left the show? Must be a way around it...

- The Silence... can someone remind me which ep they/it were in in the previous series?