User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4521561-20121224015716/@comment-4521561-20121224040714

Well Kronos was chopped into a thousand pieces so he needed a solid form to fully return. And Tartarus is not like Gaea. Gaea seems to have a conscious mind and physical while Tartarus just seems to be a primordal being without a conscience. I've never heard of Tartarus having a solid form or mind. So Hades could get them out if he and the other gods act swiftly. If he can't provide an escape route maybe he could at least provide an short cut to the Doors.