Shawn Thomsen

As serial killer Dr Madison Gray returns, McGarrett and Five-O find themselves sucked into her twisted mind games.

When a man from Detroit is killed on the streets of Oahu, the team is shocked to discover the killer's motives. Also, Chin risks everything to help Danny.

McGarrett lets himself be captured by the group he thinks is responsible for the killing of his CIA agent friend, and Tani questions whether she should tell McGarrett about the murder weapon she found at Adam's house.

Fugitive hacker Aaron Wright resurfaces to ask for help when his co-workers at the NSA are murdered. Elsewhere, Junior is forced to face the driver who killed his sister.

There are plenty of suspects when a beauty company's top sales person is murdered. Plus, Adam manages to make a new friend.

The team rushes to Mexico, where Chin puts his life in jeopardy when he attempts to rescue his kidnapped niece, Sara.