I have been watching Criminal Minds since it's pilot in 2005 and I have never watched an episode that has made me cry until this one. If you have not watched it, please do not read ahead, as it does contain spoilers
We all knew Hotchners son and wife were in witness protection to keep them safe from the Reaper and we also know how hard that was on him. Can you imagine how hard it would be to be on the phone with the person you love more than life itself, and hear them being murdered? Even though his wife hasn't been on much in the last few seasons, she is what made Hotchner seem more personable. We saw his humanity when he was with Haley and Jack. It will be interesting to see where the team and Hotchner go from here.