In the season finale Mac Taylor has a lot on his plate. He must come to grips with having let a marine die in Beirut in 1983. Also the team must stay one step ahead of a bomber.

Mac and Danny find marine corporal dead but if things don't seem right about his death. They find a drop of blood on his sleeve new signs of a struggle and several medals on his uniform. They both wonder why the Marine didn't fight for his life. Stella, Lindsay, and Dr. ...

Two women both claim to be the wife of a murder victim surprise Mac and Stella at the circumstances of their relationships. Both women have been in a trinogamous marriage with the victim. Meanwhile, Danny and Lindsay investigate the murder of a young woman who is found off a dock ...

Mac and Lindsay question Kid Rock because he was the last person to see his limo driver alive when the driver is found dead in the alley just before Kid Rock’s encore performance concert.

Mac receives a phone call confessing to an old murder before the caller commits suicide. The call leads the team to a football stadium to uncover a body and they learn the suicide victim belongs to the Tanglewood gang. They also find a cigarette that puts Danny's job on the ...

A man dressed in a superhero costume is found dead in an alley, after saving a man being mugged. Mac, Stella, and Dr. Hawkes find his clothes in a nearby phone booth. Danny and Lindsay investigate the murder of an NFL first-round draft pick, known as Superman.

The life of a transplant patient hangs in the balance as the team tries to find the hijacked plane carrying the liver.

A young boy witnesses the death of a museum curator but doesn't want to tell anyone about it. Danny investigates the death of an urban golfer found dead on a construction site.

After the body of a dead woman is found in a water tower the team, Mac, Flack and Lindsay, suddenly realize that the building may hold a bigger mystery than they expected. Meanwhile Stella and Hawkes are on the case of a dead field consultant in Washington Heights (by Harlem) who ...

Lindsay, Stella, and Mac are on the case of a dead ADA, who they discover, is involved in a "kill war" with water guns. Meanwhile, Danny and Hawkes investigate the murder of a young lady who had a penchant for suing restaurants and taking them for all they are worth.