Arriving on Space Station Nerva in its distant past, the Doctor, Sarah and Harry find its crew threatened by a mysterious plague. Discovering that things are not as they seem, they uncover a Cyberman plot to destroy Voga, planet of gold.
The newly-regenerated Doctor arrives in Victorian London, an...
Ba'al travels back in time and prevents the Stargate program...
An alien similar to Ra appears out of the Stargate, killing ...
