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.

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.

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