Oswin says, "Come up and see me sometime."
Amelia has HATE and LOVE written on her fists
Oswin mentions Vulcan
The Doctor says they are at 11 out of 10
Mentioned in dialogue by The Eleventh Doctor (Matt Smith).
Mentioned in dialogue by The Doctor.
Opening sequence design.
The Doctor plays Clara's theme on his guitar while he is in the diner, the theme first appeared "The Asylum of the Daleks" which was also Clara's first appearance and this episode is her last.
A clip is shown