Dr who forth doctor quotes Robot

The Doctor: You may be a doctor. But I'm the Doctor. The definite article, you might say.

The Doctor: Tell me on the way Brigadier! Tell me on the way! You must cultivate a sense of urgency.

The Doctor: There can't be that many people in the country with the money and resources to design and build something like...

Sarah-Jane Smith: [Walking through the door mid sentence] ...a giant Robot about 7 feet tall.

The Doctor: Yes something like that... however did you guess?

The Doctor: There's no point being grown-up if you can't be childish sometimes.

Brigadier: Believe me, Doctor, the place is impregnable!

The Doctor: Never cared much for the word 'impregnable.' Sounds a bit too much like 'unsinkable.'

Sullivan: What's wrong with unsinkable?

The Doctor: 'Nothing,' as the iceberg said to the Titanic!

Sullivan: What?

The Doctor: Glub glub glub....