While questioning Mace, they find out that some kind of comet recently landed nearby. The Doctor knows it was no "comet" and takes immediate interest in the necklace Mace is wearing. It is actually a bracelet used for prisoner control. The group begins searching the barn and comes across several power packs, and since they are far more fragile than the necklace, it means there were survivors. And so they set off to the nearby manor of the person who owns the barn.