User blog comment:IceFireWarden0/Speculations for Season 11/@comment-4616231-20131102205321/@comment-5746209-20131103211857

From what I can gather, I assume Doc is alive in subspace due to the Teleportation Cubes, as he was it the blast radius of one. Currently, he's stuck there until a certain frequency on the cubes are set, which will set him free after doing so. Hopefully, I'm correct and it will happen soon.