Don Jeanes

When four men go missing the BAU searches for a link between them in order to track them down. J gets upset when her son Henry doesn't want to celebrate Halloween.

A promising student wakes up to the hangover from hell when he is found wandering the streets covered in blood and wielding an axe. As the investigators attempt to piece together the night's events, Flack struggles to keep his cool and Mac develops a bond with the suspect.