29 March 1979
A mysterious cloud drifts menacingly through space…
A sudden energy flash and the Fourth Doctor is infected with the Nucleus of a malignant Virus that threatens to destroy his mind.
Meanwhile, on Titan, human slaves prepare the Hive from which the Virus will swarm out and infect the universe.
But can The Doctor free himself from the Nucleus in time to reach Titan and destroy the Hive? Luckily he has help – in the strangely dog-like shape of a mobile computer called K9 …
- The Host
- Death Sentence
- The Clones
- Mind Hunt
- The Antidote
- The Hive
DEVIATIONS FROM TELEVISED STORY