Creature (The Ghosts of Greenwich)
From Tardis Wiki, the free Doctor Who reference
A creature with unimaginable power lived in interstitial time under the Greenwich Meridian. No longer having a physical form, it gave Neville Plumstead the power to absorb future timelines. Vastra communed with it and helped Plumstead kill it by feeding back the energy which he had stolen from it. (AUDIO: The Ghosts of Greenwich)
