Martha, The Doctor and others in “Utopia”

But the thing is, why'd you leave him behind, Doctor?

[dismissively] I was busy.

Is that what happens though, seriously? You just get bored of us one day and disappear?

Not if you're blonde.

[sarcastically] Oh, she was blonde! Oh, what a surprise!

[spinning around, irritated] You two, we're at the end of the universe. Okay?! Right at the edge of knowledge itself! And you're busy... [struggling to find the right word] BLOGGING!