Doctor Who and the Invisible Enemy

In this captivating novelisation read by John Leeson, the Fourth Doctor faces a dire threat as a malignant virus infects his mind amidst a sinister cosmic cloud. Alongside Leela, he embarks on an extraordinary journey into his own brain to confront the Nucleus of the virus, with the fate of the universe hanging in the balance. Assisted by the enigmatic, dog-like K9, the Doctor races against time to prevent a universe-wide outbreak.