I like it when Doctor Who stories choose imaginative historic settings. I now know a little more about Prague in the 80s than I did before reading this! The dominant political force waning at that time provides a brilliant antagonist which can sit comfortably alongside a lumbering alien.

The conspiracies and different sets of spies provide intrigue. This then goes up against Jewish folklore clashing with political upheaval. There’s a lot to digest! Perhaps too many interesting threads as all of this wraps up with two of the show’s most common trope endings - the power of a parent’s love overwhelming the enemy, and the power of hope. Still, it’s an interesting ride.