Doctor Who: The Newbies Guide
The Ghosts of N-Space
This is the seventh in Virgin's Missing Adventures Series. It is a novelisation of the radio play of the same name, although the book was actually released a year before the play was broadcast.
Where does this fit?
This happens in Season 11 between Death to the Daleks and The Monster of Peladon
Other Guides to this Story
The Third Doctor has white hair, a large nose, and tends to dress as a society dandy. He has a love of technology, historical name-dropping, and vehicles. In The War Games the Doctor's people (the Time Lords) sentenced him to exile on Earth. In Spearhead from Space, he was appointed as scientific advisor to UNIT. In The Three Doctors the Time Lords revoked his exile.
Sarah Jane Smith is a journalist who, in The Time Warrior, sneaked into UNIT in search of a story. She ended up accompanying the Doctor on a trip to the middle ages. She has since taken a couple more trips in the TARDIS.
Brigadier Lethbridge-Stewart is the commanding officer of the United Nations Intelligence Taskforce (UNIT). He worked with the Second Doctor to defeat threats to Earth on two occasions (in The Web of Fear and The Invasion. In Spearhead from Space, he teamed up with the Third Doctor to prevent an invasion by the Nestene and the Autons. During that story he persuaded the Doctor to work as his scientific adviser. He has now worked with the Doctor for several years.
Recurring and Historical Characters
Jeremy Fitzoliver is a colleague of Sarah's. He embodies the upper-class twit stereotype. He "assisted" the Doctor and Sarah during the radio play The Paradise of Death
You could read the novelisation of The Paradise of Death to learn more about Jeremy, but you'd probably prefer not to.
If you have to experience this story listen to the audio version of this story instead. Yes, the guest cast are bad, but Jon Pertwee, Lis Sladen, and Nick Courtney save some scenes. And you get a mildly amusing scene that isn't in the book of the third Doctor having a kitchen disaster.
If you really want to know about Jeremy's previous adventure with the Doctor you can also listen to The Paradise of Death