As the season nears its climax, "Black Hearts" sets the stage for the explosive revelations regarding the "Katarina Rostova" mystery and the true nature of the conspiracy against the United States.
The episode asks whether the "Third Estate" radicals are simply evil, or a symptom of a broken system that Reddington himself has helped maintain. [S6E21] Black Hearts
Liz, meanwhile, is deep in her own investigation into Reddington’s true identity. The tension in this episode comes from her dual life: she is working with the Task Force by day while secretly plotting with Jennifer and others to unmask the man she calls father. This episode reinforces Liz's transformation from an innocent profiler into a woman willing to use Red’s own tactics against him. As the season nears its climax, "Black Hearts"