When a young boy who went missing in San Diego on Halloween suddenly reappears one year later, the BAU must work fast when another trick-or-treater disappears under similar circumstances.

When a young boy who went missing in San Diego on Halloween suddenly reappears one year later, the BAU must work fast when another trick-or-treater disappears under similar circumstances.

The Jeffersonian team investigates the murder of a nationally ranked gymnast, whose remains were hit by lightning and scattered throughout a public park. Although evidence points to a fellow gymnast…