Plot summary
Two sisters who are found wrapped in plastic "cocoons" and asphyxiated have Detectives Logan and Barek questioning one victim's boyfriend, Jack Strong ( Patch Darragh ), who works for Lydia Wyatt ( Sherri Saum ), a local nurse. Logan initially questions Lydia and soon runs afoul of her "powers", contracting a skin rash. As the detectives investigate her past, they begin to suspect her of extorting money from patients with voodoo, giving them false hope with her potent spells and medicine. When Jack Strong dies from puffer fish poisoning, they pressure her remaining supporter, Robbie Paulson ( Oscar Isaac ) into revealing her scheme and they charge her with the murders.
Credits
Adapted from Wikipedia contributors, Law & Order: Criminal Intent season 5. HTML formatting and reference markers removed.