Speculation Saturday! *spoilers*

[the_willows]

Here's our usual post-episode speculation post, where you can share your theories, ideas, share things you've noticed, read everyone else's therories (crack or otherwise) and generally wonder what the hell Moffat is up to.

The comments will be spoiler-filled; tread with caution. Please be considerate if posting spoilers for future episodes as part of your theorising.