A senior pathologist that Nikki had come to blows with is murdered and Nikki is prime suspect. The team fight to clear Nikki's name, as she suspects someone is trying to frame her. Tony learns of the pathologists death and fears that his son may be involved. Nikki is released from custody and grows ever more suspicious of Scott.

Thomas puts his personal feelings to aside, as the team have to track the extremists before they strike again. It soon becomes clear that Ryman has been shot by someone else who perhaps isn't dead after all.