- Jack, a broken man, meets up again with the Doctor
- His adventures with Ten and likely the Doctor himself, persuade him that he can make amends and all the good he can do.
- He finally returns to Earth
- It will be a convenient time in the future when Gwen's child is old enough that she can return to work
- Jack and Gwen re-start TW, giving it a fresh beginning away from its dark past.
- It's kind of poetic that Jack then spends the rest of his massively long existence looking for atonement. And it finally ends with his sacrificing his remaining life to keep a civilisation alive until the Doctor can free them...