4. Red Listed
S6, E4: The list of suspects who could be Red John is shortened by one, as Homeland Security agent Robert Kirkland takes his own search for the serial killer one stage further before reaching a dead-end.

S6, E4: The list of suspects who could be Red John is shortened by one, as Homeland Security agent Robert Kirkland takes his own search for the serial killer one stage further before reaching a dead-end.