Parker quits when a Backstep is cancelled that would have saved children on a subway train from being killed, and the team must question whether they obey NSA orders or act on their consciences.

Frank saves Olga from being crushed in the Sphere room and in the process is injured and goes into a coma.

An autopsy on Adam finds alien technology that can help the paralyzed walk again and Dr. Ballard jumps at the chance to be able to walk again. But soon after the device is installed, strange things start happening.