Olivia returns from the alternate reality and Peter tries to get information about her visit. Walter makes some custard for his son's birthday, while Broyles deals with the threat of a government shutdown of the Fringe Division.moreless
A suicide incident occurs at Grand Central Station, and Olivia dreams about it. Meanwhile, shocking details emerge about the ZFT manuscript and Olivia's past.
Olivia, Walter, and Peter are brought in to try and stop a killer with the ability to liquefy the human brain.