Another curious shot, this one finds the Doctor in what looks like a factory of some sort. With a torch in hand and mask over her eyes, she's hard at work making something.
We've heard that she'll acquire her Sonic Screwdriver in an unconventional way, so could she actually be forging one here? It definitely comes early on in the season, because she's still in Capaldi's outfit, so it's entirely possible that's what's happening here.
