Sterling and Peel investigate conspirators among the ranks.
Anna is enraged by the Fifth Column attacks and enlists Ryan’s help.
Fringe heads back to the 80’s.
Anna organises the Concordia gala, her latest `gift’ to mankind.
The membrane separating the two universes is becoming ever thinner.
Erica tries to find the leader of a radical faction of the Fifth Column responsible for the murders of three Peace Ambassadors.
The team investigates a bio-terrorist armed with an insect that has a taste for human flesh
Sophia and the Sleepers’ negotiations are derailed.
Erica learns her partner, Malik, is a Visitor and must fight for her life.
A scientist drops dead after a cloud of blue powder he ingested causes his bones to disintegrate.