General Cresswell informs Harm and Mac that they are being reassigned. Harm to London and Mac to San Diego. With their deadline quickly approaching. Harm and Mac must sort out their lives and resolve their feelings for each other.
Gen. Cresswell's brother believes that remains found of a Vietnamese soldier are those of a helicopter pilot who saved his life during the war. Vukovic and Graves end up going to South Vietnam in search of a relative of the man's for a a DNA match.
Part of the JAG team goes to San Diego. Harm stays back as acting JAG. While he is there, a huge snowstorm strikes and Mattie is injured in an accident. Meanwhile, Mac and Vukovic find themselves working close to each other on a case at Camp Pendleton.
Mac and Lt. Vukovic go to Indonesia to negotiate with a modern-day pirate for the release of Naval hostages. Meanwhile, Bud and Harriet have an open house in celebration of their new twin babies.
When Harm is forced to shoot down a civilian plane flying in a ""no-fly"" zone in the Persian Gulf, Harm once again finds himself on the wrong side of the court-room.
A Navy psychiatrist in Afghanistan is accused of malpractice and a age discrimination suit are the cases assigned to Harm, Mac & Bud.
A Marine captain has deserted and has become a freelance warlord in Afghanistan, seeking Osama bin Laden; the Afghan government places him on trial; Harm and Mac defend him; Islamic justice follows. The Navy recalls Bud Sr. to active duty.
Harm looks into the crash of a F-14 Tomcat.
It's Christmas Eve. Col. MacKenzie crashes her car on the way home, and while unconscious through a series of episode flashbacks and discussions with a base therapist deals with many of her issues including infertility, insomnia, loneliness, Webb, and Harm.
The car belonging to a Navy Commander assigned to a Bio-Weapons Defense Laboratory is found abandoned on a bridge across the Potomac River. Harm & Mac work with FBI agents in the investigation.
Coates gets an unexpected visit when a friend from her criminal past shows up looking for a place to stay. A Naval aviator is in trouble for giving flying lessons to her father, a civilian who just bought an F-18. Bud intervenes on her behalf.
When a US Senator is killed in Baghdad, fingers point to the squad that was sent to protect him prompting Mac and Harm to find out what actually happened.
A Marine Colonel is on the President's short list to become the new Judge Advocate General sparking controversy while Harm & Mac investigate a Navy Ensign accused of shooting a Canadian fisherman.
Harmon "Harm" Rabb Jr. is a former pilot turned lawyer working for the military's JAG (Judge Advocate General) division, the elite legal wing of officers that prosecutes and defends those accused of military-related crimes. He works closely with Lt. Col. Sarah Mackenzie, and together they do what needs to be done to find the truth.