Ah, I thought maybe not. Mars is another planet, ye see, and the moon...well. It's the moon, up in the sky.

[Sorry, that's about as good of an explanation as he can give about it, even now.]

So they're two different places, even if Polly did think we were on Mars at that time. Not at all the same, aye? Now, if it was just the once we'd landed someplace like that, that'd be one thing. But that's only the start when it comes to showing up in unexpected places.