A CSI team investigates a mysterious death at Charlie's house.
Carrie becomes obsessed with trying to convince the new neighbors that she and Doug don't constantly fight.
A decomposed body found in a tub of acid at a naval base leads Gibbs to deduce that an impostor is serving aboard one of the nuclear submarines.
Doug downplays a mold problem in the basement so he and Carrie can go on a last-minute Caribbean vacation.
Grayson asks Jane to help him with a case representing a young widower; Kim enlists Owen's help in representing a 12-year-old foster child.