Doctor Who: Circuit Breaker: Full Circuit

Strange alien artifacts begin appearing inside UNIT's Black Archive. Each object is unmistakably linked to a different regeneration of the Doctor, but they've been tampered with. A corrupted energy signature of unknown origin pulses through them, and their sudden arrival has torn tiny ruptures across time and space. To solve the mystery, UNIT calls upon a little-known incarnation of the Time Lord: the Fugitive Doctor. But how does UNIT know about her? And is she the Doctor they expect? The Doctor, Osgood and Andrew are joined by Kate Lethbridge Stewart. A final mysterious object is manifesting, this one at the pinnacle of UNIT Tower itself. A Time Bomb! Which threatens a dark future for all of the Doctor's incarnations. Only this Doctor can save herself - and her other selves - from this intricately woven scheme.