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.

When Avery's friend, an Interpol agent, is murdered by the #1 criminal on the FBI Cyber's Most Wanted List, Avery risks her life to capture the killer, the Deep Web's most notorious and dangerous drug dealer.

Avery and the Cyber team attempt to work with black hat hacker Stella Kaine (Kelly Osbourne), to track down the hacker who took identity theft to a new level and digitally “killed” Avery’s ex-husband,

The cyber crime team investigates when nine planes that departed from the same airport face a coordinated Wi-Fi attack while in flight.

A woman is murdered while she video chats with her parents. Avery's skill is tested when she interviews the only witness, an agoraphobic neighbor who is suffering from PTSD following the incident.

When the Cyber team investigates what appears to be a hack into air traffic control’s communication system, a greater threat emerges when a flight vanishes into thin air, drawing the team into the world’s first case of cyber-hijacking.

The Cyber team investigates when users of a traffic app are rerouted to remote locations and robbed by masked women. Also, Russell reconnects with Greer Latimore after the team completes business in Los Angeles.

Avery confronts the hacker who released her patients’ information when she was a psychologist, and Krumitz confronts the man who murdered his parents.

When a hacker takes control of all networked medical devices at a hospital in Dallas and threatens to kill one patient every hour if his demands are not met, the Cyber team must find the source and figure out how they accessed an airtight security system.

The cyber team investigates the murder of a hacker who was hired to erase an assault victim’s comments from a confessional website.

When Raven's friend, Tracey (Lyndon Smith), is fired, evicted and her bank accounts emptied as a result of being hacked by a man she met on a dating app, Raven helps to locate the culprit. However, Raven asks for her team's help when the hacker is found dead and Tracy wakes up in a motel room with the murder weapon and no memory of what happened.

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 mistaken text sent by her.

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.

The Cyber team tracks a vigilante who is killing the biggest offenders of objectionable posts on social media websites.

Ryan and her team are alerted to a new cyber threat when they discover that arsonists have a new, less traceable way to start fires in homes – by hacking into the owners’ printers and laptops via a software patch.

Special Agent Avery Ryan and her team investigate when a man dies after taking medication he purchased from a hacked ad on a medical website.

When a police officer’s body camera is hacked and the incendiary video goes viral, the Cyber team is sent to find the truth and the hacker before the small town erupts in unrest.

The Cyber team investigates a child abduction case based on the “Red Crone,” an online myth where an abductor lures children through an app on their phones. Also, Elijah’s aggressive behavior at work causes Avery to bench him, and romance is in the air for D.B.

When a jogger’s body is found, the Cyber team use the fitness tracker she was wearing at the time of the murder to retrace her steps for the entire night leading up to her death.

The cyber team investigates the abductions of young women whose social network pages are being kept up to date. Also, Ryan helps Trish McCarthy cope with the death of Trish’s sister, Ryan’s former psych patient.

Avery and the team investigate when a power outage in Detroit is used to mask a jewelry store robbery-homicide in which the jewels weren’t the target.

An innocent bystander is killed when dozens of ATMs spew money into the street. The team investigates the bank heist and learns it was orchestrated by a real-life Robin Hood.

The Cyber team must track down a bomber fixated on revealing the “truth” about society’s overreliance on technology.

The cyber team tracks a killer who hacks into a popular online game and tricks gamers into delivering illegal weapons.

D.B. Russell joins the team as the new Director of Next Generation Forensics while they investigate a case of burglary and homicide committed by someone who hacked the home's security system.