The Doctor's Wife

I am currently re-watching season 6 of Doctor Who that is now on netflix. Currently on the episode called "The Doctor's Wife" where his Tardis(Time/space machine) had it's soul in a human body. This show's original series was created in the 70s and the Tardis and the doctor has been the only really constant subjects. But until now the Tardis and the doctor never spoke, and it makes the episode incredible, the writing is amazing and brings tears every time. They have been each other's only constant companions for 700 years, It's heartbreaking.

The Doctor: I don't understand. Who are you?
Idris: You really not know me? Just because they put me in here?
The Doctor: They said you're dangerous.
Idris: Oh, the cage's stupid.
[Touches her head]
Idris: In here. They put me in here. I'm the...
Idris: What do you call me, ah... We travel. I go
[makes the TARDIS sound]
The Doctor:The TARDIS?
Idris: Time and Relative Dimensions in Space. Yes, that's it. Names are funny. It's me. I'm the TARDIS.
The Doctor: No, you're not. You're a bitey mad lady. The TARDIS is up and downy stuff in a big blue box.
Idris: Yes, that's me. A type 40 TARDIS. I was already a museum piece when you were young. And the first time you touched my console, you said...
The Doctor: I said you were the most beautiful thing I'd ever known.
Idris: Then you stole me. And I stole you.
The Doctor: I borrowed you.
Idris: Borrowing implies the eventual intention to return the thing that was taken. What makes you think I would ever give you back?