Brian Appel

The BAU travel to Philadelphia where the latest victim of the `The Replicator' has been found murdered.

A mass murderer abducts Garcia and Reid, forcing the rest of the team to find them. The BAU examines their past to try and figure out why the pair have been targeted.

When the BAU goes up against a gang of serial-killing bank robbers in Washington DC, the team tries to negotiate the situation unfolding inside the bank. However, the stakes rise when one of their own becomes a hostage.

As the BAU continues to negotiate with the serial-killing bank robbers, one of the team gets married Prentiss ponders her future.

The BAU interviews candidates to take the opening left by Kate's departure; the team tracks a serial killer who leaves behind evidence that indicates a person intent on revenge.

The BAU team up with the organised crime unit when a congressman's wife is held to ransom. Plus, could there be love in the air for Spencer?