"Criminal Minds" season 12 episode 4 may see the hunt for a murderer and that could be Aaron Hotchner, as per reports.

Entitled "Keeper," episode 4 will see the Behavioral Analysis Unit (BAU) hunting a serial killer, who is hiding along the Appalachian Trail in rural Virgina, Christian Today has learned. As per the publication, the killer murdered seven people and the BAU submits themselves in danger when they opt to go to the woods to find the killer. As per reports, the said woods serves as the killer's territory. The killer is described to have long and sharp nails, in addition to mastery of the area.

In this regard, Thomas Gibson's Hotchner is back on track in "Criminal Minds" season 12 episode 2. According to iTech Post, rumors say that he is not the one who hunts, but the one who is being hunted down. This story arc suggests that Hotchner could be the serial killer the BAU is looking for in the episode.

As per reports, Hotchner was revealed to have left for a task in the third episode of the series. In this regard, rumors claim that the character is set to be central to the show's plot, but he will no longer be part of the BAU.

Meahwhile, Paget Brewster, who plays Emily Prentiss, is set to be a series regular again. In her interview with CBS News, the actress said that her character had been running Interpol for four years and it was just really nice to be back on the team full time. According to Brewster, the crew had made Prentiss powerful and good at the job.

"Criminal Minds" season 12 episode 4, "Keeper," is set to air on oct. 26 at 9:00 p.m. on CBS.