Foyet on his cell phone and threatens him repeatedly. Foyet responds that Haley looks good with dark hair. Haley, believing Foyet is the new marshal assigned to protect her and Jack, lets him into the house. During a frantic drive to his own house, Hotch calls Haley and speaks with Foyet. Foyet tells Haley how her ex-husband broke their deal by still trying to track him down. Therefore, he has to kill Hotch's family in retaliation. Hotch informs Jack that he needs to help his dad work the case, and so Jack goes upstairs. Haley tells Hotch he needs to tell his son how they met so Jack would still believe in love. Foyet shoots her three times as Hotch and the rest of the team listen on the phone. Hotch arrives at his house, enters, and discovers bloody footprints leading up the stairs. He finds Haley's body lying on the floor and sees a figure hiding behind the curtains. Hotch empties a clip into the hidden figure, who turns out to be Foyet wearing a bulletproof vest. Foyet falls to the floor and the two men engage in a brutal hand-to-hand fight. Hotch beats Foyet to death, even after Foyet surrenders. The rest of the team arrives. Morgan (Shemar Moore), Prentiss (Paget Brewster) and Rossi (Joe Mantegna) check upstairs and find Hotch still beating Foyet, causing Morgan to have to pull Hotch away from Foyet. Hotch goes to check on Jack, who had helped his dad work the case by hiding in a chest – their secret plan designed to protect Jack. At the end of the internal investigation, the panel rules that Agent Hotchner's actions were acceptable under the circumstances. Production The writer of this episode, Bo Crese, is actually an acronym used in the credits of "100". It is an acronym formed from the first letter of the name of every writer who contributed to the script: Breen Frazier, Oanh Ly, Chris Mundy, Rick Dunkle, Erica Messer, Simon Mirren and Edward Allen Bernero. This was used because each writer wrote a section of the episode. In an early draft of the script for this episode, Hotchner was written to kill George Foyet with his own knife. However, Edward Allen Bernero and Thomas Gibson believed the scene would be more powerful if Hotch used his bare hands. Speaking about the 100th episode, showrunner Edward Allen Bernero said he