Tirek is on the rampage, relentlessly stalking Princess Twilight Sparkle to complete his takeover of Equestria. Doctor Whooves manages to shelter several ponies, who decide to hide in Golden Oaks Library, only to find themselves within the tree moments before it is destroyed. This is where the Doctor has been hiding his T.A.R.D.I.S. all along, and the tree ship sends them back in time.

Now they have to find out what purpose they've been sent back for, and hopefully not change history in the process. Some ponies have different plans, however...

--You might like this story if you also like:--
Doctor Who
Time Travel stories
Alternate Re-imaginings of MLP:FiM episodes from seasons 1-4
Doctor Whooves with several companions all at once
Bon Bon secretly showing her Secret Agent abilities
Lite Lyrabon shipping
Princess Twilight and Unicorn Twilight...in the same time period!
A story which reads like both a Doctor Who episode and an MLP:FiM episode