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In the season finale, when Gideon is accused of recent terrorist attacks, he and Captain Conrad race to find the real culprit.

Gideon's life is jeopardized, so Conrad sends him home to get some distance from District 13. When the men after Gideon locate him, Murphy and Gideon hide in his unknown lab, where they get stuck.

When a serial rapist is out there somewhere, Captain Conrad directs Gideon and Murphy to locate the criminal before there are any more victims.

When Murphy and Ada team up to help solve a murder, they discover that the killer's next target is Gideon. After learning his safety's at risk during his company's huge technology convention, they utilize a high-tech scanning system to try and track down the killer.

After Gideon's dad gets into trouble, he looks to Gideon for help. Meanwhile, Brandt and Goss work to hunt down the leader behind a big grand theft auto case.

After a guy goes to extremes to find justice for his daughter, Gideon and Martinez utilize new technology to examine the case. Meanwhile, the assistant state attorney continues to question Gideon and his plans for the 13th district.

After armor-piercing bullets are discovered on the black market, the squad decides to send Officer Brandt on an undercover assignment to seize the criminals selling them.

A group of robbers kill a security guard who was a former police officer and who, before his death, used the APB app.

When Gideon goes with Murphy on a ride-along to see the effect of his reforms, they come across a pharmacy robbery that results in a child getting hurt.

After tech tycoon Gideon Reeves witnesses his best friend being killed, he takes lead of Chicago's rattled 13th District and reorganizes it as a technically advanced police force, challenging the district to reconsider everything about their methods of fighting crime.