10 Darkest Alternate Timelines In Doctor Who
5. The Doctor Dies And The World Falls Apart (Turn Left)
The Turn Left timeline is another example of the Earth suffering large amounts of damage, but unlike The Year That Never Was or the viral doom foretold by the Monks, this reality is much worse due to one huge factor: the death of the Doctor.
Accidentally drowning himself while battling the Empress Of The Racnoss, Turn Left shows us - in great detail - what a Doctor-less planet Earth would look like, and needless to say, it ain't good.
He isn't around to stop Miss Foster and her Adipose children, and as a result, millions of Americans are killed. The space Titanic crashes into London - completely annihilating the city - leaving many people dead, and many others forced to become refugees. The Torchwood team then dies in an attempt to stop the Sontarans, and later, England is in such a catastrophic state that non-English citizens are carted off to "labour camps."
The horrified look on Wilf's face truly conveys the hopelessness of the situation.
Turn Left showed how important the Doctor is to the wellbeing of Earth, and if not for Donna's brave sacrifice - which reset the timeline and allowed her to save the Doctor from his watery demise - things would've continued to worsen.