In the years following his travels with the Doctor, Wolfie pursued his studies in quantum physics. He was a freelance alien hunter by night like Heather. The two reunited in 2014, four years after Heather's travels with the Doctor ended. Wolfie and Heather saw the Doctor one more time, when he saved their lives and then departed to check on Rose Tyler on 1 January2005 and face his regeneration into his eleventh incarnation. (COMIC: Lucky Heather)
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.