Having just re-watched the ep, I think there was definitely something inside The Thing That Was Rising Up From The Ground.
Whether it had tentacles or not, I wouldn't like to say; it seemed fairly indistinct to me...
As for the key around the neck thing; I assume his job was to active the failsafe device himself, should the need arise. The SPs presumably never expected anyone would be able to get to him, given he was protected by an army of zombies. A bit careless of the SPs, though; you'd have thought that the SPs wouldn't have been surprised by team AI managing to survive an attack by a dozen zombies; I'm sure none of us viewers were...
Re:
Whether it had tentacles or not, I wouldn't like to say; it seemed fairly indistinct to me...
As for the key around the neck thing; I assume his job was to active the failsafe device himself, should the need arise. The SPs presumably never expected anyone would be able to get to him, given he was protected by an army of zombies. A bit careless of the SPs, though; you'd have thought that the SPs wouldn't have been surprised by team AI managing to survive an attack by a dozen zombies; I'm sure none of us viewers were...
-roy