[Right. Gene and Annie insisting they're real is one thing, and that- well, Sam doesn't really know what to believe about that. But the Doctor's different. He's a fiction. Sam grew up watching his adventures weekly on telly. He rolls his eyes.]

And you'd know that how? You're not real, mate; you're a fictional character. Even if you're not a figment of my imagination, you're a product of somebody else's.