[s10e4] The Itch May 2026

The Behavioral Analysis Unit (BAU) travels to , to investigate a series of murders involving victims whose bodies are covered in scratches. The investigation reveals that the UnSub (Unknown Subject) suffers from Morgellons disease , a delusional skin infestation where the sufferer believes their skin is infested with bugs or fibers. The UnSub: Leo Jenkins

The BAU successfully tracks Jenkins to a basement where he is holding a victim. After a tense standoff, the team manages to apprehend him without further loss of life. The episode concludes with a somber reflection on the thin line between physical ailments and the devastating effects of untreated mental illness. [S10E4] The Itch

: A former journalist who lost his sanity after the death of his son. He became obsessed with the idea that a government conspiracy or an environmental factor caused his "infestation." The Behavioral Analysis Unit (BAU) travels to ,

: He kidnaps individuals he believes are part of the "cover-up" or who can help him expose the "truth." He uses a high-frequency device to stimulate the sensation of "crawling" in his victims to make them understand his pain. After a tense standoff, the team manages to

: Jenkins becomes convinced that an entomologist at a local university is responsible for releasing the "bugs."

: Leaving the victims' bodies in public spaces after they have scratched themselves to death or been killed during his "experiments." Key Plot Points