Board Thread:Tales from the Tardis/@comment-188432-20130325173913/@comment-188432-20130414000140

Trebligoniqua's post proves my point entirely. We avoid all that speculation, all that worry, by just saying the story concludes with The Shadow Heart. Whatever happens with the character of Vienna beyond that point is of no concern to this wiki because Big Finish have said that the series Vienna is not a spin-off of Doctor Who. If someone says their work isn't a spin-off of Doctor Who, it's simply easier to believe them.

Likewise, Death's Head's adventures with the Fantastic Four and various members of The Avengers after the Seventh Doctor drops him off on top of the Baxter Building because the Marvel Universe is no concern of ours, and Sontaran adventures in the Faction Paradox universe don't matter to us.