In the beginning, the BAU team members are being interviewed individually by Section Chief Erin Strauss (Jayne Atkinson) for an internal investigation concerning Unit Chief Aaron Hotchner (Thomas Gibson). George Foyet a.k.a. "The Reaper" (C. Thomas Howell) had been corresponding with Karl Arnold while the latter was in prison. The team discovers Foyet became dependent on medications after he'd stabbed himself repeatedly. When a pharmacist explains to JJ (A. J. Cook) that one allergy medication could be replaced with another, JJ figures out there must be certain medications that Foyet takes that cannot be substituted. After discovering where the letters originated, Reid (Matthew Gray Gubler) starts to create anagrams for "The Reaper" to figure out the alias Foyet may be using, and he comes up with the name "Peter Rhea." Narrowing down the addresses on the letters along with the name and the probable name Foyet would use to pick up his medication, the team thinks they've pinpointed Foyet's location. They surround the apartment and knock on the door, but when there is no answer, the team goes in. There is a large stack of mail near the door that indicates Foyet hasn't been around in awhile. Garcia (Kirsten Vangsness) takes a look at the laptop in the home and discovers Foyet had set up an internet alert for Peter Rhea, which meant he would be alerted when anyone did a search on the name. In the home, there are also photos of Sam Kassmeyer (D. B. Sweeney), the U.S. Marshal assigned to protect Hotch's ex-wife, Haley (Meredith Monroe), and son, Jack (Cade Owens).