The first War Machine is defeated but the Doctor only has a matter of hours to destroy WOTAN before the rest of its army is activated.
Did You Know?
This episode marks the only time during the black-and-white era of the show when an entirely new "crew" join the Doctor in the TARDIS, with no continuing companion to ease the transition. See more
When the Doctor, Ben and Sir Charles enter the workmen's tent, it is only just taller than the three men, all of whom have to duck to enter. The internal shots, however, have a couple of feet of headroom. See more