“There’s been a string of killings, from a drowning, to strangulation, to a hit and run. There seems to be no connection – except all the victims are fathers with sons the same age, and the killings are following the sins laid out in Dante’s Circle of Hell. Apparently, the UnSub has some serious daddy issues.” — CBS
During the episode, the killer hallucinates a voice repeatedly crying to him, “Abandon all hope, ye who enter here.”