Doctor Who: The Newbies Guide
This is the eleventh novel in Virgin's Missing Adventures series.
Where does this fit?
This happens between Seasons 13 and 14 (between The Seeds of Doom and The Masque of Mandragora)
Other Guides to this Story
The Fourth Doctor dresses in a rather bohemian outfit, notable for its long scarf. He is somewhat alien, willing to play the fool, and almost never gets on with authority figures.
Sarah Jane Smith is a journalist who, in The Time Warrior, sneaked into UNIT in search of a story and ended up accompanying the third Doctor on a trip to the middle ages. Sarah has subsequently become the Doctor's travelling companion.
Recurring and Historical Characters
Harry Sullivan was the Doctor at UNIT (the United Nations Intelligence Taskforce) when the Doctor regenerated from his third incarnation to his fourth (Robot). The newly regenerated Doctor invited him to go for a spin in the TARDIS and he joined the Doctor and Sarah for a few adventures before they arrived back on Earth (in Terror of the Zygons) and Harry returned to his normal life. He subsequently got involved in highly classified work at Porton Down (Harry Sullivan's War).
For more on what happened to Harry between leaving the Doctor and his appearance in this story see the Companions of Doctor Who novel Harry Sullivan's War (written by the actor who played him).