Mac it is finally found but is unclear on a few things because of a concussion. Also we meet Detective Flack's sister Samantha who has an unexpected connection to the case.

When a woman ends up dead at a Maroon 5 concert, the team find themselves in danger. They find that the cause of death is linked to several victims over several months. They rush to find the cause of the deaths to save one of their own.

Mac will need to figure out how to capture a killer on a commercial flight.

When a woman dies in the middle of a street parade, Mac and his team must figure out what happened to her. This investigation leads creates some personal issues for Hawkes and professional issues for Mac.

The body of a man is discovered dressed as a modern day "Indiana Jones", Mac and his Stella investigate his life. Their investigation leads to an interesting discovery about the man's true identity. Stella finds herself in danger and as a result of the investigation from an unlikely source.

When three men are found to have been murdered at the same time, Mac realizes that the three men are defendants in an old case of his. As the team processes the evidence, new information comes to light.

The team finds more than just a house floating up the river; they also find a group telling secrets that could be deadly.

In the one hundredth episode of CSI: NY Mac faces his most deadly foe yet. There is a serial killer loose in New York City killing people with the name Mac Taylor making Mac a target.

The team finds bones of a victim in an unlikely place; Lindsay gives Danny some unexpected news.

When an armor truck is broken into and a guard is found dead, the team finds themselves hampered by a strange energy field that appeared at the time of the incident. Danny pops the question to Lindsay as they continue to explore the future of their relationship.

Mac runs into Ella McBride who could cost him time in figuring out if Isabelle Vaughn died by eating the miracle fruit. Stella gets in trouble with Mac.

The sale of a wedding dress turns deadly. Sheldon's next case gets personal for him and gives him the answer to a question for his past.

Flack's interrogation of a wrestler turns deadly.

Two men end up in New York City looking for their daughters who have been missing for a period of time. One of them is found dead. Flack is back on duty.

Mac will have trouble solving the next case because of police officers deciding to go on strike because of no payment. On this particular case Mac could be short a CSI, while trying to figure out how the deputy Mayor was killed.

The team wonders why so many people wanted John Sturgeon's money.

Adam saves a life and Danny and Lindsay tie the knot.