S2, E4: The Sixth Precinct's search for the murderer of a fellow officer is derailed as Annie Reilly creates a fissure in the Corcoran home. Meanwhile, Eva Heissen -- attempting to preserve a secret she has carried for months -- discovers an ally in Brendan Donovan. Elizabeth Morehouse struggles to soothe her troubled conscience, deciding to aid the Freemans in their quest for Sara's mother. As Francis Maguire, running parallel to Corcoran's hunt for a cop killer, finds himself crossing paths with his old friends -- to surprising results.