Mind Over Matter is an episode of series 21 that first aired on 3 February 2005.
When the body of a young medical student is found in a park, the team have a difficult investigation on their hands. Heavy rain has destroyed any evidence but their body has been arranged into a childlike pose. Then another body is discovered with almost identical neck wounds and Burke has to face the prospect of a hunt of a serial killer. An unexpected twist leads the trial to a therapy centre where Jackie goes undercover to volunteer.