Sworn enemies of the Kaleds, and later of the Daleks, the Thal were the other species living on the planet Skaro.
Doc falls into a ten-minute coma, circumvents some forgettable bacteria and introduces the Daleks to the perils of molten ice.
The Doc’s now a mere human; Susan should be in primary school; Barbara is her sister; and Ian just wants to tap-dance. What the actual f**k?!