Season 5 of the high-octane spy series finds Annie (Piper Perabo) coming in from the proverbial cold after a months-long stint of life off the grid; and ditching the brunette look of Season 4 in favor of her natural blond locks. Her hair isn't the only thing that's changed—her health has, too, and for the worse. She tries to keep that fact under wraps from her CIA colleagues, however, as she wants to remain in the field with Auggie (Christopher Gorham) as her handler, not bound to a desk. The field work includes one of the major story arcs of the 16-episode season: pursuing those responsible for a terrorist attack on a secret CIA facility in Chicago. Along the way, she meets and falls for former Navy SEAL-turned-private contractor Ryan McQuaid (Nic Bishop), who recruits former National Clandestine Service director Arthur Campbell (Peter Gallagher) to his firm. Auggie, for his part, finds romance with National Counterterrorism Center investigator Hayley Price (Amy Jo Johnson), who's looking into the Chicago incident, and is reunited with old hacker flame Natasha (Liane Balaban). Auggie's past also comes into play as part of another story arc: members of his former special-ops unit are being eliminated. In other events, Joan (Kari Matchett) returns from maternity leave to her old stomping grounds at DPD; and Calder (Hill Harper) stewards the NCS, though his position could be endangered by his relationship with a high-end escort (Nazneen Contractor).