One-and-a-half years after the dissapearance of Lyra and Bon Bon, the Cutie Mark Crusaders are sent back in time by a moving statue to Ponyville 70 years in the past and meet Lyra Heartstrings, who is now a detective trying to defeat the statues. With her help, they try to stop them and find a way to get back home.
Based off the Doctor Who episode "The Angels Take Manhatten" plot-wise.
A sequel to "Blink"
Fahking.
Weeping.
Angels.
Don't Blink.
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Just as I predicted. You would be doing a crossover of the two most impacting Weeping Angel episodes.