The mangaka and the animators have moved on to other projects with little mention of continuing the series.
If it is still on their 'to do' list, there are no indicators it will be anytime soon or for that matter, any better than this episode.
Echhi? Yes!
But, as with all apocalypse (death by zombie) genres, I have yet to see a good series that has a well established beginning (character establishment during the 'event' and the creation of the 'new' reality), a solid middle (development of the cause and effect and further character development and interaction) and an end (where either the human's triumph, face their ultimate extinction or unknown future) without defaulting to 'deus ex machina'.
HSOTD started out well, establishing that this was a human extinction event - a global event of unknown origin and 'fleshing' out the characters so to speak (Love Saeko!).
But, this episode was a miserable attempt at maintaining interest in the series.
I have bought the DVD of the series and the graphic novel as well for my library.
Lowering my review accordingly.
This Episode, Overall: Poor
