Allison was sent back into the past - astral project. It reminded me of Charmed's Series Finale - Charmed Forever. In order to save the future, she had to go into the past. The Butterfly Effect movies were based on this phenomenon. Realistically, people cannot change anything in the past. Everything happens for a reason. Joe didn't know about her abilities, because it would be hard for "normal" people to understand this. Realistically, everyone has a sixth sense that they are suppressing when they grow up. For example, parents always know when their kids are in trouble. Interesting direction for this show.
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