Everyone is shocked when a member of the crew is found dead from a gunshot wound. While at first glance it appears to be suicide, the gun is nowhere to be found. The crew is confined to quarters while a search is performed and when the gun shows up in Col. Young’s quarters, he becomes the number one suspect.
Britta dares Jeff to find himself a partner for a double date with Pierce and his new girlfriend. Shirley and Britta help Annie to learn anatomy for a special health fair presentation in school.
After a cargo ship runs aground, the shoreline becomes littered with bodies hosting a giant squid-like creature. The Fringe team descends upon the scene to examine the bodies and discovers that the mysterious organisms are actually giant parasites. As the investigation unfolds, Walter heads back to the lab while Olivia, Peter and Broyles race against time when they realize the case has ties to a threatening organization.
Frankie encounters two perfect siblings and vows to make her children stop fighting and become a loving family. Meanwhile, Aunt Edie makes a costly mistake at the quarry and Mike considers firing her.
Unexpected visitors greet H.R.G.; Samuel’s plan starts to come to fruition; struggling to accept the truth, Peter takes extreme measures to get what he wants; Claire’s journey leads her to an unexpected destination.