A decomposed body is discovered in a tub of acid at a naval base and Ducky and Abby learn that the victim was a submariner.
A good friend of Jessica fears for her sanity.
Harm and Mac must prosecute a Marine colonel who defied orders in order to rescue his men from a Haitian warlord.
The night before Christmas, Harm visits the Vietnam War Memorial in his father's memory. A woman is also there and Harm is surprised to discover that she was a friend of his father.
Harm (David James Elliott) defends a secretive Mac (Catherine Bell) when she is put on trial for a despicable crime.