Louis' and Rebecca's lives hang in the balance. Meanwhile, Dorn tries to take down Dimitrov

Genovese returns to New York and becomes involved with human trafficking

The team hunts a sniper who is randomly killing innocent people

A string of teen suicides that may be linked to Internet bullying are investigated

A German biker gang embarks on a home-invasion spree. Meanwhile, Sebastian goes undercover for the first time

As Genovese awaits trial, he offers the ICC an attractive bargain

The team goes after a gang of black widows who seduce wealthy men into marriage and then poison them

A string of deaths are traced to toxic cocaine in London

The ICC tries to protect a movie star after a string of murders involving a film director, agent and journalist take place

The disappearances of several backpackers may be linked to a serial killer

The gang escalates their deadly rampage. Meanwhile, the team deals with tragedy and deception

The gang escalates their deadly rampage. Meanwhile, the team deals with tragedy and deception