 Mia takes over Susannah's body (and melds with it, giving her legs for a short while) and runs in it to yet another "when" of New York, this one circa 1999, to give birth to the demon child.Susannah is the last member of Roland's "ka-tet" to leave him (and the only one to survive in a Keystone world), having been given the chance to return to another form of Eddie and Jake in a parallel world.Jake Chambers is an eleven-year-old boy from the New York of 1977, and is considered by Roland to be his "true son".