The discovery of a prosthetic arm in the river leads detectives to look into the case of a woman in the National Guard who went missing shortly after returning from a tour of duty in Iraq, where she lost an arm. Detectives learn she had trouble fitting back into civilian life and that she was haunted by memories of her time "over there". Meanwhile, Scotty lets his brother Mike know the man who was Mike's boxing coach as a boy was being charged with molesting a boy.
- Kathryn Morris as Lilly Rush
- Danny Pino as Scotty Valens
- John Finn as John Stillman
- Jeremy Ratchford as Nick Vera
- Thom Barry as Will Jeffries
- Tracie Thoms as Kat Miller
- Nestor Carbonell as Mike Valens
- Lesley Fera as Dana Taylor
- Tim DeKay as Geoff Taylor
- Kristin Bauer as Paula
- Brian Gross as Tommy Kelly
- Katherine Narducci as Brenda
- Camillia Sanes as Alegria Valens
- Michael Wiseman as Charles Kozlowski
- Gigi Goff as Lindsey Taylor (2004)
- Lily Goff as Lindsey Taylor (2006)
- Malik Kirkwood as Boy
- Aramis Knight as Emilio Valens
- Saundra McClain as Female Principal
- Bitsie Tulloch as Tara Kozlowski
- Unknown child actress as Penny Kozlowski
- This episode has some similarities with the third season episode "Honor". In both cases the victims are war veterans who suffer from a disability in their arms and want to forget their past. Both have a close friend of them killed in war and both feel responsible for it. At the end the victims appear in their uniforms.
- Vera mentions "that girl in Iraq, had that guy on a leash", referring to Lynndie England, the female army reservist made infamous by the image of her holding a prisoner by a leash around his neck during the Abu Ghraib scandal in 2004.
- Jeffries, considering the possibility that Dana was killed by her husband, suggests Geoff might have "pulled a Scott Peterson", in reference to Scott Peterson, who was convicted in 2004 for the 2002 murder of his pregnant wife Laci. A TV movie shot and released while the case played out featured Cold Case actors Sarah Brown and Tracy Middendorf.
- Vanessa Carlton "White Houses"
- Dido "White Flag"
- Snow Patrol "Chocolate"
- Citizen Cope "Bullet and a Target"
- N. Lannon "Turn Time Around"
- Snow Patrol "Grazed Knees"
- Closing Song: Oasis "Little by Little"