Doctor Who: 13 Cool Details Steven Moffat Just Revealed About The Girl In The Fireplace
7. The Episode's Potential Link To The Waters Of Mars
During the watch-along, Davies shared a couple of facts about the real-life Reinette/Madame de Pompadour, and interestingly, one of them can be linked to David Tennant's penultimate story as the Tenth Doctor, The Waters of Mars.
Pompadour is often associated with the phrase "après nous, le déluge" - after us, the flood. While she obviously hadn't seen Doctor Who back in the 18th century (barring any timey-wimey shenanigans, that is), Davies tweeted that, within the context of the show, the phrase could've been used to foreshadow The Waters of Mars.
That episode has the Doctor facing off against a viral infection called The Flood. While Davies probably didn't have this story planned out all the way back when The Girl in the Fireplace was being filmed, it would've been an amazing call-forward to Ten's final days if Reinette had spoken about a flood at some point.