John Leeson (the voice of K9) stars in this exciting novelization of a classic adventure for the Fourth Doctor—and the introduction of K9. The Doctor becomes infected with the Nucleus of a malignant Virus that threatens to destroy his mind. Luckily there is help—in the strangely dog-like shape of a mobile computer called K9.
About the Author
Terrance Dicks was full Script Editor of Doctor Who from 1968. His later script writing credits on Doctor Who included the 20th anniversary story "The Five Doctors."