Who? It may have been the original crew themselves. Though, if that's the case, it seems as though that wasn't their intended outcome. It isn't clear what they're trying to accomplish in the recordings found on the bridge, but it seemed to consume a large amount of energy and was presented like it was a difficult, fragile process. it is possible they triggered... something. I'm unsure what.

[Connor had processed a myriad of potential theories based on the evidence that had been made available to them so far. If this one was true, then it followed that they were in a very volatile situation where drastic and unpredictable occurrences were possible without warning.

The number of variables and unknowns in play were making it difficult for him to pin down any one theory that was more probable than any other, however.]

Do I think we're here to preserve civilization? [The LED on the side of his temple flickered yellow as he considered the question.] ... No. [He seemed to hesitate though.] I mean, maybe. It is a possibility. Given the empty station, however, and our varying origins, it seems very unlikely.