Proctor and Lennox find themselves at the cutting edge of forensic science when they try to solve a burglary case, where the burglar has left an 'earprint' at the scene. Meanwhile, Proctor receives a call from a woman who reports to have information about a serious crime. She reports that she was witness to an assault that Carver and Skase have been investigating, where they are unable to prove their prime suspect is responsible. Proctor tries to convince her to testify, but she does a disappearing act. Proctor then discovers she is having an affair, which is making her scared to testify. When her boyfriend is found beaten up, Proctor heads straight for his prime suspect and discovers the weapon used.

This episode was broadcast out of production order - using the older closing titles and fonts last used earlier in the series