This gripping, taut and classy drama is revealing just how little we know about the most famous plot in British history.
Our education continues tonight, as Catesby and his cousin head to Spain to drum up support for his plan to kill King James I.
Unsurprisingly, the authorities plump for negotiation over murder, and Catesby is sent packing, while sneaky Robert Cecil is hunting him down back in Britain.
But there’s new hope for the zealous revolutionary when he finally meets the quiet and devout Guy Fawkes, and they plan to raise an army ready for a rebellion.
We remember enough from school to know that this won’t end well.