193 The Labours of Travellers part one

Life in Stalin’s Russia is hard as the Doctor discovers when the TARDIS takes him and Antoine to an industrial town intent on doing all they can to meet their targets. But they soon get swept up in history, falling in with politicians and workers all trying to survive the harsh realities of their lives.
While Antoine goes underground and experiences the claustrophobic horrors of a cramped mineshaft, the Doctor witnesses firsthand the paranoia and fear rife throughtout the country. It’s the time of the Purges and nobody is safe.
But who is hiding in the warehouse on the outskirts of the city? Why are they mining for minerals nobody has ever heard of? What are the creatures that scurry around just out of sight? And who is responsible for the hole in the time vortex?
Sometimes, being forced to work until you drop dead isn’t the worst thing that could happen to you.