The Doctor has encountered two apparently immortal humans:
Ashildr
Jack Harkness
Are they related?
Like, lineage related? I doubt it; both are immortal because Dr. Who somehow intervened in their [del]lives[/del]deaths. OTOH, that kind of ridiculous crap has been a part of story-telling for, oh, all of recorded history, so who knows what the writers will decide later?
“Encountered” is putting it mildly. The Doctor was fairly instrumental in each of them becoming immortal.
As for whether they’re related…why would you think so?! They were born millennia apart, and the ways they each became immortal were completely different.
No. Jack Harkness was made immortal by Rose Tyler after she looked into the heart of the TARDIS and became “Bad Wolf” She brought him back to life after he was killed by Daleks.
Ashilder was a Viking girl who the Doctor accidentally made immortal by using alien technology from the Mire to help revive her after an accidental death.
Can I just say that as a Scandinavian the mangling of Ashildr’s name makes me cringe every time she reappears? It’s a combination of Ás (deity) and hildr (battle/strife) and shouldn’t start with the syllable Ash! Why research Norse names and not bother looking up pronunciation?
Jack isn’t even human. Unless there’s a good explanation for how mere extreme age could turn a human being into a giant disembodied head…
I thought that was just something that might be; is it canon now?
It’s weird but then there’s no precedent for someone living five billion years so who knows? When the Master aged the Doctor he went all big-head, tiny-body too.
Pretty much, yes. Jack, who comes from the Boeshane Peninsula, commented in passing that in his youth he was known as the “Face of Boe” in some publicity campaign.
Aye; I remember that. But I also remember that it was left hanging. [Wikipedia seems to back up my recollection: