Bradley Walsh credited as playing...
Graham O'Brien
- The Doctor: I'm stupid. Really stupid. Can you believe how stupid I am?
- Graham O'Brien: Is that a rhetorical question?
- The Doctor: I can't believe I didn't think of it sooner. There's too many things going on, too many variables. My brain is too crowded!
- Judy Maddox: [softly, to Graham] What is she talking about?
- Graham O'Brien: No idea, you get used to it, she normally explains in the end.