User blog comment:MasterCharmander13/Announcing some DWA Season 6 Stuff/@comment-30695453-20151126191002/@comment-24121492-20151127071207

These episodes sound awesome. Yea, you can make a sequel story. As Turtle said, he did that previously. And even in Real Who, Gatiss confirmed a Sleep No More sequel in Series 10(*sigh*), so yea, you can.

As for the companions, yea, you gotta waita bit. I can tell you this: I'm not making Shalek and/or Tetra leave in the opener. So if they don't leave in the special, then they're staying. However, if they do leave in the special, you gotta wait till I introduce the new companions.