Matt McTighe

The race for the Chief's position is on, as the doctors compete for Richard's affections, a surgical patient endangers the lives of those around her, and Meredith's Alzheimer's-stricken mother, Ellis, experiences a change in her medical condition.

When Lisbon and Jane look into the murder of an army medic who helps rehabilitate veterans who have suffered mental injuries, their primary witness suffers from severe amnesia.

When a gang of suspected murderers begins targeting a new victim each night, the BAU travels to Portland to head them off before they can strike again.

A strange encounter with a man called Dennis has an effect on Maura.

Reese has his work cut out trying to protect a member of the Irish mob and his innocent moll after his gangland boss takes out a million-dollar contract on them. In an effort to help Reese, Finch makes a surprising deal with Elias.

Criminals start to fall victim to a series of brutal murders. Whilst investigating, it appears to Nick that the culprit may be a character from a Latino legend, on a vigilante killing spree.