More military guile on display as tonight's contestants find themselves in 69 BC on the desert battlefield of Tigranocerta. In charge of an Armenian army, they attempt to drive out invading Romans and reverse history.

In 216 BC, Cannae in southern Italy is the setting for a meeting between a young African general with big ideas and more than 70,000 Roman soldiers assembled to crush his invasion. Can a team of Bedfordshire police officers inflict a humiliating defeat on Rome by re-creating the tactical genius of Hannibal?