Doctor Who: The Edge of Destruction (Target Doctor Who Library, No. 132)

In a final bid to regain control of the TARDIS's faulty control system the Doctor is driven to experiment with a dangerous untried combination. With a violent explosion the TARDIS blacks out and the crew find themselves trapped inside. A simple technical fault? Sabotage? Or something even more sinister? Tension mounts as the Doctor and his companions begin to suspect one another. What has happened to the TARDIS? Slowly a terrifying suspicion dawns. Has the TARDIS become the prisoner of some powerful fifth intelligence which is even now haunting the time-machine's dark and gloomy corridors? ISBN : 9780426203278 After the First Doctor's failed efforts to regain control of the TARDIS's faulty control system result in an explosion causing everyone to black out, the Doctor and his companions find themselves trapped in the craft. Strange occurrences cause them to suspect the TARDIS has been infiltrated or worse that one of the crew members has sabotaged the TARDIS.