Ken Lally

The BAU team investigates a string of brutal bludgeonings in Philadelphia and is led to the city's boxing scene in search of the killer.

The Enterprise is crippled by waves of destructive anomalies that distort the laws of physics while searching for the Xindi, and Ventaxian pirates attack the ship.

A slave girl, Rajiin, uses her mental powers on the crew to steal information on humans for her Xindi overlords, and Trip and T'Pol attempt to insulate the ship from further destruction from a physical phenomenon.

David finally decides to settle his debt to Victoria while Emily helps Nolan with a takedown of his own.

A renegade Sloane holds the secrets to a mysterious Rambaldi device's powers, while Vaughn begs an uncooperative Dixon to help the CIA in rescuing Sydney.

When four nefarious villains lay siege to a bank, Angela sends HRG and her dangerous new walking weapon in after them. Hiro and Ando track Daphne to Germany, while Tracy Strauss searches for answers about Niki.