The first voice on this of at least four different entities it sounds like to me, has a bit of an accent as you listen to him. "We will come home free" he says. Almost as if he is reassuring others of their success in making good on their escape. The "They have a Key" and "They have Key" I cannot tell what accent it is but my guess they are neither British or American because Brits and Americans would not be concerned with me having a key to let them out. Now the "Who are you?" may very well be an American.
I always loved investigating in this part of the ship. With the prisoners that were kept in the forward cargo hold three decks below this and the old furniture and the energies attached to those items it always made this area of the ship most interesting.