Agent Bishop questions her previous work at the NSA after being sent to Gitmo to gather evidence for a Navy chaplain murder case; Bishop's brothers visit for Thanksgiving.
The team investigates the murder of a man who sold military information, leading to the abduction of a doctor whose cutting-edge neurotechnology could be developed into advanced weaponry; Callen tries to have an important talk with Arkady.
When a house is stolen completely off its foundations, the CSI team search for answers; new CSI member Julie Finlay showcases her skill in blood analysis.
A young couple spending time in an empty house that doesn't belong to them find themselves in trouble when a security guard who was a decorated war veteran is shot dead in the street outside. Brenda returns from leave early to help solve the murder but finds her investigation is taking place under the watchful eye of Deputy District Attorney Claire Baldwin.
Lola travels to Washington to help her husband land an important job at the FBI; Mark and Amy Quinn's relationship heats up as Amy tries to put together a winning defence for Vic Callan's murder case.