Doctor Who: The Newbies Guide
This is the fifth story in Season 3.
All four episodes are missing from the archive.
Where does this fit?
This happens shortly after the previous story, The Daleks' Masterplan
The first Doctor looks like a human in his sixties. He is physically quite frail, but has a keen intellect. He is paternalistic towards his companions, and has a degree of arrogance towards others. He sometimes mispronounces words.
Steven Taylor was a space pilot from an unknown time in the future. His spacecraft landed on the planet Mechanus, where a group of robots called Mechanoids held him prisoner. In The Chase, he escaped when the Doctor, Ian, Barbara, and Vicki visited the planet whilst on the run from a Dalek time machine. He stowed away on the TARDIS not knowing it was capable of time travel.
Recurring and Historical Characters
There are a number of historical characters in this story, but we are not expected to know who any of them are.
The Doctor and Steven are still recovering from the deaths of Katarina and Sara Kingdom in The Daleks' Masterplan.
None. The story works best (on first viewing) if you are largely ignorant of the historical context. Though that effect is slightly marred by knowing the overall title.