I thought I could hear the voices of the third and fifth Doctor during the scene where the salvage crew member was opening up the console. Did anyone else notice this?
The very first of those voices was Susan, giving her explanation for TARDIS. I heard Romana II as well.
I didn't notice anyone else post about it in the thread ... Did everyone see the close-up of the key? In the early part of the episode, right before the shields come down, the Doctor turns the key. There is a close-up, and it is clearly labeled "smiths" ... I thought that was adorable.