ON THE PLANET SKARO, THE DALEKS PLOT THEIR revenge for the part played by the Doctor and his companions in overturning their conquest of Earth in the twenty-second century. Now aware that the time machine of their enemy is called the TARDIS, they have completed a time machine of their own, complete with movement scanners to locate the Doctor’s vessel. The Dalek Supreme having despatched an assassination group to pursue the “humans” through all eternity, the