David J. Lee

The Behavioral Analysis Unit quickly determines that the kidnapper isn't after money -- he's after the victim's twin sister. Now, they must determine how to save the original victim without putting her twin in danger, which becomes even more complicated when it becomes obvious that the kidnapper is somehow always a step ahead of them.

The race for the Chief's position is on, as the doctors compete for Richard's affections, a surgical patient endangers the lives of those around her, and Meredith's Alzheimer's-stricken mother, Ellis, experiences a change in her medical condition.

At a state wedding, Lightman and his team work to prevent the assassination of a South Korean ambassador. But when someone else is shot, Lightman exposes long-held family secrets and lies to identify the assassin.

It's late at night in a major hospital, and everything is quiet. An old man shuffles down a hall, into an elevator, and right into the office of Dr. Graydon Whitcomb. With an amazing burst of strength and speed, the old man lifts his oxygen tank and swings it at Dr. Whitcomb's head! The next day Monk shows up at the hospital with his own medical emergency: a bloody nose. His seemingly incurable nosebleed leads him to seek out Dr. Whitcomb, the hospital's chief of neurotrauma. Entering Whitcomb's office, Monk bumps into a coffee table, and then into the dead body of Dr. Whitcomb!

It's Halloween at Hearst College, and while Veronica is looking for Logan at the underground campus casino, the place is robbed. The thieves take Veronica's necklace, which was given to her by her deceased friend Lilly. Meanwhile, Dean O'Dell (recurring guest star ED BEGLEY JR.) and his wife, Mindy (JAIME RAY NEWMAN - "E Ring"), seek Keith's help in tracking down Steve (RICHARD GRIECO - "21 Jump Street"), the biological father of Mindy's son, who is deathly ill. And distracted by a new group of friends, Wallace struggles to pass his Mechanical Engineering class.