Blue Bloods Season 10 Episode 12 revolves around Tommy Martin, a cop who commits suicide.

After Martin shoots himself in his cop car, it falls to Frank to console the widow. However, Rosemary is not interested in Frank's words of consolation, as she blames him for her husband's death. She lashes out at Frank and goes.

Frank's team investigates and finds out that Martin had an unsavory past: a night with a prostitute who turned around and blackmailed him. Frank doesn't think it would do Rosemary any good to know this and refuses to share it with her, which inspires still more rage in her.

While Frank is struggling to get through to Rosemary, Delgado asks Danny for one more favor: keep his sons safe. Danny discovers that Carlos has been kidnapped and from that moment forward butts heads with the ADA, who only cares about Delgado testifying and not about Carlos' safety.

Finally, Eddie butts heads with Erin and Jamie when they get on her for the way she is approaching a case where she believes a 16-year-old is lying to protect her father.

To find out what happens, watch Blue Bloods Season 10 Episode 12 online.