The crew is hit with an attack by an unknown force unlike anything they've seen before. As confusion and aggression take hold, Marcus and Sam can no longer trust their own senses even as they race to save the sub and defend the island.

Cast: Andre Braugher, Scott Speedman, Daisy Betts, Camille De Pazzis, Dichen Lachman, Daniel Lissing, Sahr Ngaujah, Autumn Reeser, Jessy Schram, Robert Patrick, Omid Abtahi, Daniel Bess, Jessica Camacho, Gideon Emery, Jay Hernandez