Circuit Breaker is a bold new chapter in the Whoniverse offering an ambitious interconnected narrative that will unfold across multiple formats, inviting fans to experience the mystery from every angle.

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.

UNIT is out of options. To repair the damage and restore the timeline, the objects must be returned to the exact moments they were taken from. If not, the Doctor's adventures - and the universe itself - could unravel.

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?