'Circuit Breaker': 12-'Full Circuit' by Robert Valentine

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.

Jo Martin (The Doctor), Omari Douglas (Andrew), Ingrid Oliver (Osgood), Jemma Redgrave (Kate Stewart), Dan Starkey (The Conductor), rest of cast TBA

Directed by Barnaby Edwards

Release Date:
September 2026

Notes:

*Featuring the Fugitive Doctor, Petronella Osgood, Andrew Turner, Kate Stewart and UNIT

*A Big Finish audio production

*This story was part of the multi-platform 'Doctor Who' project 'Circuit Breaker'; BBC Books was just one of many media companies partnering for this epic tale, including BBC Studios, BBC Audio, Big Finish Productions, 'Doctor Who Magazine', East Side Games, Penguin Random House and Titan Comics