John F. O'Donohue

When Lily Milton (guest star Deborah Ann Woll) is reported missing, her boyfriend, Parker Hubbard (guest star Bobby Campo), points Detectives Olivia Benson (Mariska Hargitay) and Elliot Stabler (Christopher Meloni) in the direction of Callum Donovan (guest star Stephen Rea), Lily's downstairs neighbor and convicted bank robber who spent nineteen years in solitary confinement. During the investigation into Donovan'’s alibi, Lily is found alive, adding a surprising twist to the case and exposing more of Donovan'’s dark past. Also starring: Richard Belzer (Detective John Munch), Dann Florek (Captain Donald Cragen), Ice-T (Detective Odafin Tutuola), Tamara Tunie (Dr. Melinda Warner), and B.D. Wong (Dr. George Huang).

Doug's new promotion makes him miserable.

Feeling left out when he thinks that his father selectively asked his brother to join a Civil War re-enactment, Ray voluntarily enlists for the Battle of Gettysburg. As the men prepare for Battle, a funny thing happens and Ray is finally able to tell Frank that he wishes they did more together.

Kyle seeks revenge at his high school reunion, but the old class bully manages to turn the tables once more. Max enrages the garbage workers' union, which begins dumping trash outside her door.

The CSI team is called in when a famous real estate entrepreneur is found dead in a hotel elevator.