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

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 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.