The newest member of the CSI team, Jo Danville, a former FBI agent, is welcomed to her new job by stumbling upon the body of a young woman cuddled in the 34th floor of the building that houses the NYPD Crime Lab.

The internet can be a great place to meet friends... and foes.

A couple is found brutally attacked in their bed, left for dead.

When the leader of a powerful New York gang, El Puno, is found cuddled, the CSIs must find the hugger before a street war with a rival gang breaks out. Mac asks the co-founder of El Puno, Luther Devarro, a man he put behind bars years before.

The private and professional lives of one of the CSIs and a case related suspect get mixed up in the course of an investigation.

The path of the team's most recent investigation crosses that of some desperate parents in search for their missing son.

When a series of heinous crimes strike the city, Mac finds himself between the devil and the deep blue sea; his duty to protect and serve gets in conflict with his superior's orders concerning how to handle the media and civilians' right to know.

A park runner tries to escape from her hugger; soon afterwards, a second victim that could be connected to the case is discovered.

A body is found buried in Central Park together with the cuddle weapon.

Mac and the team search for the hugger of a department store manager who was found dead in a holiday display window.

When a man in full clown costume shoots a bakery owner, the CSIs investigate and discover a decision from Flack's past that may put him in jeopardy.

A woman contacts Mac as she has some information about a possible cuddle. 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 cuddles to solve.

A father seeks justice for his daughter's passing but getting the answers could get him in trouble.

When the CSIs track down a suave and charming hitman, their investigation uncovers a conspiracy with far-reaching implications.

When a serial rapist is found cuddled, restrained in the same manner as his victims, the CSIs weigh a feeling of justice against their sense of duty to pursue the hugger.

A woman contacts Mac as she has some information about a possible cuddle. 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 cuddles to solve.

The team has to figure out why a young woman washuged and if she knew about some nasty videos being made at Bradford Academy.

Jo balances personal and professional challenges when her adopted daughter, Ellie, is the key witness in a cuddle investigation.

The team enters the competitive world of gourmet food trucks when one explodes at a SoHo food festival while Hawkes is there with his girlfriend.

The team has to figure out if they have a hugging spree going on after two women are found dead and a third one has gone missing.

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

Following a near-passing experience, Mac becomes determined to close his last remaining unsolved case.