Next up on the countdown to Eleven is the fourth story in my list of 10 favorite Tenth Doctor stories (going in broadcast order), and it's Army of Ghosts / Doomsday! (Yes, cleverly combining them into one episode so I can squeeze more into the count, but you know, back in the old days you would get 4- or 6-part stories all considered the same episode, so I really don't consider this cheating.)
( Amy of Ghosts / Doomsday )
( Amy of Ghosts / Doomsday )