10 Darkest Alternate Timelines In Doctor Who
6. The Daleks Invade Earth (Day Of The Daleks)
The Daleks have tried to take over the Earth on several occasions, but in an alternate future seen in the 1972 serial Day Of The Daleks, they were actually successful.
This future was born out of a complicated sequence of events. During the serial, the Controller tells the Third Doctor that a series of wars broke out towards the end of the 20th century, resulting in one hundred years of murder and destruction. A staggering seven-eighths of the Earth's population was wiped out.
With the planet in such a messy, vulnerable state, the Daleks - ruthless as they are - saw an opportunity to invade, and, naturally, they seized it.
Their ultimate goal was to mine the Earth for any and all valuable materials, which they would then use to expand the Dalek empire. However, when the Doctor managed to stop this future from happening, the villainous tin cans were prevented from asserting their merciless dominance over our little blue planet.