A highly intelligent serial killer “over there” forces the two Fringe teams to work together as the killer’s doppelganger “over here” is brought into the fold to help.
While Jamie's under arrest, she manages to manipulate Mitch and Logan into helping her hunt shepherds, members of a secretive group responsible for sterilizing humans.
Mitch seeks to rescue Clementine from her captors, and a glimpse into Jackson's sister Abigail's (Athena Karkanis) past reveals the origins of the hybrids.
