Pat Destro

After a series of murders in Lower Canaan, Ohio, is connected to a serial killer who had been executed a year ago, the BAU must find the link to the current crimes.

The doctors try to cope with heartache and injuries caused by the plane crash; everyone at Seattle Grace struggles to return to normalcy amid the chaos.

Rush reopens the case of a hitchhiker found murdered in 1997 near Atlantic City, New Jersey. Initially, after reviewing the case, Rush and the homicide team believe that the victim, Matt Mills, was hitchhiking with his recent casino winnings and was murdered by a truck driver, who may have committed a series of homicides along his truck route.

Catherine's testimony in court is not enough to convict a killer suspected of murdering his own mother. Adam Novak, with whom Catherine had a brief romantic encounter, is the lawyer who represents the killer and secures his freedom. As a result, Catherine and Nick leave Las Vegas in order to tie the killer to another crime and put him behind bars for good. Meanwhile, Grissom says goodbye to his colleagues and heads east for a teaching sabbatical. (TV-PG)

In an effort to raise income, Nate and David decide to rent out a room in the funeral home; Claire struggles to grasp the lessons of her outreach hike in the mountains; Ruth attempts to reconcile her feelings about Hiram; Brenda's Aussie friend gets under Nate's skin; and David is buoyed by the news of extra funeral business.