The Doctor discovers that the sound is not a symptom of the Master's insanity, but before he can learn more, the Master is abducted by troops and placed in the custody of billionaire Joshua Naismith (David Harewood).
The Doctor discovers that the sound is not a symptom of the Master's insanity but something implanted in him from outside. But before the Doctor can learn more, the Master is abducted by troops and placed in the custody of billionaire Joshua Naismith (David Harewood).