Lt. Harmon "Harm" Rabb, a JG Lawyer who investigates and litigates crimes committed by Navy and Marine personnel, looks into the mysterious death of a female pilot aboard an aircraft carrier. Harm is convinced the female pilot who fell overboard didn't commit suicide, but was actually pushed, with all the suspects aboard the aircraft carrier.

Harm & Kate continue to investigate the death of Lt. Angela Arutti, all the while the carrier remaining on combat status.

A civilian tech rep aboard a submarine seizes control of an experimental torpedo after its launch during an exercise. The rep threatens to sink a cruise ship and demands a ransom. Harm and Ltjg. Meg Austin go to the sub and save the day.

A murdered female lieutenant turns out to be Lt. Schonke, a friend with whom Harm attended Academy, but neither Cdr. Krennick nor Agent Turque, an abrasive civilian investigator, buys Harm's claim that his relationship was strictly platonic. After the primary suspect of the murder is also found dead - a more than dubious suicide - Harm finds himself being the number one suspect for both murders ... Locations: US Naval Base Norfolk, Va.; Washington D.C.

Harm discovers evidence that his father, an MIA from the Vietnam War, may be alive and under KGB control in Russia.

Harm and Mac are investigating the murder of a Navy pilot whose body was found hidden aboard the decommissioned aircraft carrier the USS Hornet. With help from a local police lieutenant, they discover a motive for the crime, which involves a list of MIAs and POWs supposedly still alive and under KGB control in Russia -- and the list includes Harm's father. But before Harm can act on the information, the book mysteriously disappears along with the helpful police lieutenant.

Mac arrives at Harm's apartment and is surprised to see that he has forgotten she was coming over and that he is getting to leave with a firearm. Stalling him, she gets him to tell her the story 2 years ago of the murder of his then-girlfriend, Lt. Diane Schonke, an Academy classmate, after her ship, the USS Seahawk docked in Norfolk. When Harm shows Mac a picture of Diane, Mac is stunned to see that Diane looks just like her.

When Harm tells Mac that he believes he has finally figured out who the real murderer is (Agent Turque) and that he intends to confront him, she gets him to initially agree to take her with him. Harm however tricks her and drives off, leaving Mac behind standing in the rain. Desperate to find Harm before he does something he'll regret, Mac calls Bud to meet her at JAG. Bud was an Ensign on Diane's ship and was one of the people who found Diane's murdered body. Bud tries to help Mac fill in the gaps and helps Mac learn that Agent Turque isn't the murderer.

At the request of Lt. Cmdr. Brumby, Admiral Chegwidden sends Harm and Bud to Australia to represent a U.S. Naval officer, Kevin Lee, who has suddenly surfaced 28 years after being "murdered" by an Australian sailor. Lee contends that he accidentally killed his Australian nemesis years ago and, in a panic, exchanged identities with the dead man.

Now, charged with both deserting and murder, Lee is to be tried in an Australian court, pitting Harm against Brumby. Harm and Brumby are also about to go head-to-head outside the courtroom when Mac appears in Sydney and Brumby decides it's time to make her choose between him and Harm.

The murder/desertion trial of Kevin Lee takes a bad turn after his wife changes her testimony under cross examination.

Harm and Mic fights to win over Mac

A murdered JAG officer teams up the JAG staff with agents of the Naval Criminal Investigative Services (NCIS).