David J. Lee

The BAU is quick to realise that the kidnapper of a US district attorney's daughter abducted the wrong twin.

The doctors compete for Richard's affections; a surgical patient endangers the lives of those around her; Meredith's mother, who has Alzheimer's disease, experiences a change in her medical condition.

A South Korean ambassador is a target for assassination at a state wedding; the plot thickens when another individual is gunned down instead.

On Halloween, as Veronica is looking for Logan, the underground campus casino is robbed. One of the missing items is a necklace given to Veronica by Lilly. Wallace struggles to keep up in school.

A minor nosebleed sends a panic-stricken Monk scurrying to the nearest hospital, where he investigates the death of a doctor.

Beth comes to the rescue when scorching sunlight depletes Mick's vampiric ability to heal himself as he searches for a woman believed to be hiding in the desert.