After being misled for a time, Hotch and the team finally identified the Reaper as George Foyet, the only one to have supposedly survived the Reaper by injuring himself. Hotch and the team arrested Foyet but he escaped from prison shortly afterward, going on the run. In the season four finale, "... And Back '', Hotch was confronted in his apartment by the Reaper (identified by his trademark mask). Foyet stabbed Hotch nine times and tortured him with a knife before delivering him to the hospital. Although Hotch survived, Foyet took Haley 's and Jack 's address from Hotch 's apartment, requiring them to be placed in protective custody and unable to contact Hotch while Foyet was at large. Following the encounter with Foyet and subsequent loss of contact with Hotch 's family, there was concern within the Bureau, and also on the part of Agent Morgan, that Agent Hotchner was suffering the effects of Post Traumatic Stress Disorder, and Hotchner 's actions were analyzed more closely. In season 9, Hotch is hospitalized due to complications from the old stab wounds after collapsing in the team 's conference room.
when did hotch get stabbed by the reaper
the season four finale, "... And Back ''