That was absolutely brutal to listen to. A fantastic and incredibly dark story, listening to something as awful as domestic abuse means I can't say I 'enjoyed' it, but I recognize how good this story was. The tension kept getting ratcheted up throughout, and the ending was as dark and twisted as we could expect. It seems so far the point of 'Zygon Century' is to interrogate 20th century society more than create a full Zygon invasion story which is pretty interesting. Now to see how the Doctor slots in next episode...