Danny looks into the murder of the son of a Russian gangster this week, while Eric tackles a high-profile corruption case. It’s all a part of “Family Ties.”

An escort is found dead this week, leaving Danny and Jackie to investigate the killing. Elsewhere, Frank vows to bring a killer to justice.

Danny investigates the murder of a popular nightclub’s doorman this week, while Frank receives information about his former partner.

The Reagans find themselves in danger this week when a trio of inmates are released from jail. The episode is titled “Re-Do.”

Jamie becomes a witness of a crime this week. As a result, Frank goes out of his way to try and protect him.

Danny is on a mission to find a narcotic source this week, following the deaths of three teenagers. Jennifer Esposito’s Jackie Curatola assists.

Erin tries to take down a gang leader. She uses his brother as bait, which causes a debate among the family.

A bomb threatens to be set off in Manhattan on this episode. As you might expect, that’s the focus of the NYPD on “What You See.”

A police officer is killed on this installment of Blue Bloods. Henry tries to prod an old friend for information on the incident.

Danny, Erin and Frank work together on this week’s episode. Their goal is to find justice when a rape case’s main suspect is protected by diplomatic immunity.