4. Que Viene el Coco

Holly's investigation uncovers a pattern – individuals in different cities across the country who are accused of murdering children, with strong forensic evidence incriminating them for the killings, while equally strong evidence shows they were somewhere else at the time of the killings. In the aftermath of each crime a series of suicides and revenge kills occur in the families of both victims and accused. Holly and Ralph theorize that there is one killer who becomes a perfect doppelganger of various unassuming targets, carrying out the horrific crimes in the target's form while the target is away.

The doppelganger who committed the murder scratches a stranger before assuming their form and repeating the pattern in this new target's city. Terry is the latest target, with Heath Hofstadter, the nurse in Dayton, preceding him, along with a woman in Harlem named Maria Caneles preceding Hofstadter. After meeting Caneles, Holly is approached by a woman named Idilys Castro, who explains her belief to Holly that the perpetrator is a boogeyman who feeds on the suffering of its victims and their families. An increasingly erratic Jack leaves furniture and a dead animal in the woods for the entity who controls him and communicates with him.

Ralph identifies on security footage that local bouncer Claude Bolton was scratched on his wrist by Maitland's doppelganger the night of the Peterson murder. The boy who carjacked the van admits to Ralph that he saw a man take the parked van in Dayton but was afraid to mention him before. He draws a picture of the man, bearing a clear resemblance to the figure seen around crime scenes in Cherokee City.