The fate of the U.S. government is at stake as Avery and the Cyber team search for the hacker responsible for the largest breach of highly classified data in history after millions of federal employee files are stolen. Also, Avery and her ex-husband have a heart-to-heart and D. B. considers a future with Greer.moreless
The team investigate a traffic app that reroutes users to remote locations where they are robbed by women in masks; with business completed in Los Angeles, Russell and Greer Latimore reconnect.
The Cyber team tracks a vigilante who is killing the biggest offenders of objectionable posts on social media websites.
Cyber's most notorious criminal, Python, returns to kidnap Avery's surrogate daughter, making the team decipher a series of elaborate code-like puzzles in an attempt to save her life.
Avery's ex-husband returns from a trip to Tokyo. When he presents his Passport to US Customs, he is shocked to learn he is dead. A Black Hat Hacker has somehow hacked into the US Government's Official Death Record and created a false death certificate for him. Avery's team quickly arrest the hacker. As the team congratulates themselves on another solved case, it is discovered that another hacker, who is apparently a member of a collective who specialize in killing people online, aka "Cyber Murder", has declared three witnesses against a powerful Drug Lord dead online. Two of the witnesses are immediately murdered. Avery is forced to seek assistance from the Black Hat who targeted her ex-husband in order to find the third witness before the Drug Lord does.moreless
When residents of New York City cannot reach the police when calling 911, the Cyber team realizes this is an airborne computer virus that is infecting cell phones and must find the hacker responsible. Also, D.B. meets a woman after responding to a text she sent by mistake.moreless
The team enters the world of street racing when a remote controlled car is involved in a traffic accident. Meanwhile, Russell tries to find out who stole all the pen springs from FBI Cyber and Avery is offered the chance to be Deputy Director.moreless
Racial tensions start to rise as the team stats an investigation after a video of a black man being murdered by a cop goes viral. Meanwhile, Elijah is called into questioning after he used force during a confrontation and Nelson starts to feel discriminated against due to his skin color.moreless
After an ailing man dies from using fake medication purchased online, Avery and the team diligently try to track down and apprehend the seller before his dangerous pills flood the market and possibly cause more deaths.moreless
A student is determined to get even when she is the victim of cyber bullying.
The CSI's investigate a series of fires that may have been started via the internet by use of a computer code. As the investigation progresses Brody is stunned to discover that he is partially responsible for the invention of the code. He soon suspects that his former partners in crime may have a hand in the fires and goes undercover to investigate.moreless
Avery and the team pursue a serial killer who has hacked the website of an online car service in order to use it to locate and murder the service's customers. Meanwhile Daniel is forced to confront a tragic event from his past.moreless