For the last few months now, we’ve been telling you that we’re working on season four of Threshold. But we haven't told you what it's about. We're going to fix that now...sort of. We're going to tell you a story of something Amy did several years ago—something that very nearly had disastrous consequences—which is kind of a metaphor for what season four is all about. Consider this a strong hint about what's to come in just a few weeks.

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