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Peter and Olivia follow a strange signal into the woods.
Walter drops acid to try to free his mind.
Olivia and Peter find Sam Weiss' body protecting the signal.
While tripping Walter sees both his assistant who burned in his lab, Dr. Carla Warren, and a young Nina Sharpe.
Carla Warren set fire to the lab to burn Walter's work to keep him from trying to be God.
The signal leads them to an observer child, left with a family by Donald.
The Observer child, Michael, doesn't age.
Olivia and Michael remember each other through different timelines.
Walter doesn't know what is real and what is not, or which way to turn.