Howard is transferred to a mysterious prison called Echo. An unexpected visit gives Emily a connection to her old life. Emily Prime and Shaw's investigation is met with resistance.
The fallout of the lockdown casts suspicions around the OI. Howard and Emily Prime find clues about the history of Management. Clare questions her allegiances.
Management makes a historic decision. Emily sends a warning. Quayle, Clare and Temple investigate the final Indigo cell. Howard Prime reaches out to an old contact.