Nikki Jupiter was a Private Detective and later a brief companion of the the Doctor. When she first met the Doctor she was investigating the criminal underworld of New Memphis. She followed her father who was also a Private Detective. At age seventeen she first met the Doctor. After she stopped the corruption of the Underworld a Judoon called Rok Ma joined her detective agency. (NSA: Judgement of the Judoon)
Multi-adventures reference the rare instance when a companion is shown or stated to have multiple adventures with the Doctor but only appears in a single story.
If a medium is not mentioned, then this incarnation did not have companions who were original to that medium; it does not mean that this Doctor failed to appear in that medium.
