When an awkward teen is found dead, the team discovers that his efforts to win a sexy punk rock chick's heart may have gone a step too far.

The episode was rated 7.97 from 117 votes.

The tenth anniversary of 9/11 proves a wrenching but clarifying passage for Mac, who suffered a terrible loss on that day. Meanwhile, an open-and-shut robbery/homicide proves more complicated than anyone had anticipated.

The episode was rated 7.98 from 138 votes.

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.

The episode was rated 7.99 from 81 votes.

Mac and the team are deeply affected as they must investigate the murder of one of their lab techs who found murdered on the stairs of a vacant brownstone. The building was the scene of an unsolved murder of a famous socialite in 1957 and the scene was staged so that everything matches the previous case. Also, Mac's relationship with Christine continues to grow as he joins her for a family party

The episode was rated 8.00 from 107 votes.

Unrest erupts in a community where an unarmed man was shot by police which means the CSI team needs to work as fast as possible to solve the case.

The episode was rated 8.01 from 139 votes.

The team must figure out why a food truck suddenly exploded killing its owner. They also must see if the complaints filed against him had anything to do with his murder.

The episode was rated 8.02 from 99 votes.

A woman contacts Mac as she has some information about a possible murder. However, before Mac gets to meet with her, she ends up dead because of the information she has shared. Mac is left with more questions and two murders to solve.

The episode was rated 8.03 from 96 votes.

When a popular student and star pupil at Manhattan's most elite private school is murdered, the CSIs find themselves immersed in the highly competitive world of over-privileged youth.

The episode was rated 8.06 from 104 votes.

The CSIs are called to a Brooklyn housing project to investigate the murder of a successful businessman who still felt the pull of his old neighborhood.

The episode was rated 8.07 from 106 votes.

The most exclusive jewelry auction of the year ends abruptly when an appraiser is killed during the event. The investigation takes an emotional turn when the CSIs must confront one of the greatest tragedies in human history - the Holocaust.

The episode was rated 8.07 from 85 votes.

After a hail of gunfire tears through the crime lab, Mac and his ex-partner become part of a vendetta 17 years in the making.

The episode was rated 8.09 from 114 votes.

When transferring Robert Dunbrook's son from prison to court, the NYPD is ambushed by a group of professional kidnappers who kill a member of the team and one of the CSI's lives hangs in the balance.

The episode was rated 8.10 from 88 votes.

Jo's adopted daughter is a witness to an attack on the subway and learns the truth about her real mom.

The episode was rated 8.20 from 107 votes.

Mac tries to find a little girl missing since 2002 who saw the murders that took place at the time of a burglary.

The episode was rated 8.31 from 103 votes.

After Flack makes an enormous drug bust, and locks it up at CSI, the drug lords infiltrate the building at gunpoint to get them back. Now the team must resolve the hostage situations, all the while with Mac, Stella, and Hawkes trapped inside.

The episode was rated 8.36 from 77 votes.