'But why? Look at these people, these human beings; consider their potential! From the day they arrive on the planet, blinking, step into the sun - there is more to see than can ever be seen, more to do than- no, hold on.

Sorry, that's The Lion King.' -- Tenth Doctor

'Such a lonely little boy. Lonely then, and lonely now.' -- Reinette

'I always promised Jackie I'd take you back home.'
'Everyone leaves home in the end.'
'Not to end up stuck out here.'
'Yeah but stuck with you... that's not so bad.'
'... yeah?'
'Yes.' -- The Doctor and Rose

'I love you.'
'And quite right too. And I suppose... and this is my last chance for me to say it... Rose Tyler, I- [transmission cuts off]' -- The Doctor and his Rose

'Hello, I'm... Sparticus.' -- The Doctor

'When I look at her now I can see them. The hole they left, all the pain that filled it... I just don't know if I can face that every day.' -- The Doctor (about Jenny)

'Isn't travelling with you all one big spoiler?'
'Well, I try to keep you away from all the major plot developments. ... which I seem to be really bad at.' -- The Doctor and Donna

'Think, Donna, think. When you met Rose in that parallel world, what did she say?'
'Just.. the darkness is coming.'
'Anything else?'
'... [sees Rose over his shoulder] why don't you ask her yourself?' -- The Doctor and Donna

'Rose.'
'Hey.'
'Long time no see.'
'Yeah, been busy, you know?' -- The Doctor and Rose