Doctor Who - Knock Knock

Not quite as creepy as "Hide", but pretty good.

So thoughts...

• Good and creepy on the atmospherics and things coming out of the walls.


• I wish they had kept in the reference to Harry's other grandfather. Would have loved it if the Doctor had made the connection with Harry Sullivan.


• Everyone lives in the end of this one. Did they think it would get too depressing for the season if everyone died all the time?


• Is there a deliberate parallel between the girl being kept hidden in the tower for 70 years and whatever is in the vault that the Doctor has kept locked up for 70 years?


• Whatever is in the vault plays the piano and eats Mexican.


• It's safe for the Doctor to enter the vault.


• Nardol doesn't view what is in the vault the same way as the Doctor does.


• Is the vault keeping us safe from it, or the other way round?