- Doctor Who: You know, what you need is a change.
- Sarah Jane Smith: Hmm.
- Doctor Who: How about a little trip in the TARDIS? I'm just off.
- Sarah Jane Smith: Wait, you can't just go!
- Doctor Who: Why not? It's a free cosmos!
- Sarah Jane Smith: The Brigadier!
- Doctor Who: The Brigadier? Wants me to address the cabinet? Have lunch at Downing Street, dinner at the Palace, and write seventeen reports in triplicate! Well I won't do it. I won't, I won't, I...
- Doctor Who: [pounds his fist on the table] won't!
- Sarah Jane Smith: [startled] Ooh!
- Doctor Who: Why should I?
- Sarah Jane Smith: Doctor, you- you're being childish!
- Doctor Who: Well of course I am! There's no point in being grown up if you can't be childish sometimes.
- Brigadier Lethbridge-Stewart: You know, just once I'd like to meet an alien menace that wasn't immune to bullets.
- [last lines]
- [the TARDIS starts dematerializing. As it fades the Brigadier enters]
- Brigadier Lethbridge-Stewart: Doctor, about that dinner at the Palace: Her Majes...
- [the TARDIS fades away completely]
- Brigadier Lethbridge-Stewart: [to the empty room] Yes. Well, I'll tell them you'll be a little late.
- Doctor Who: The trouble with computers, of course, is that they're very sophisticated idiots. They do exactly what you tell them at amazing speed, even if you order them to kill you. So if you do happen to change your mind, it's very difficult to stop them obeying the original order, but... not impossible.