When Gideon accompanies Murphy on a ride-along to see the impact of his reforms, they run into a pharmacy robbery that results in the injury of a child. Gideon vows to get involved and tests out a new drone, but after that fails, he is inspired by an unlikely source to create new electric motorcycles to help find the suspects. Meanwhile, Murphy is disturbed when she hears that someone close to her is the leader of a new project that could take down Gideon's plans for the 13th district. Don't miss the high-speed action.

A group of robbers kill a security guard who was a former police officer and who, before his death, used the APB app. Meanwhile, Gideon redesigns a feedback chair - previously utilized in the aerospace industry - for use in the investigation room, and Murphy learns that her ex-husband, Assistant State Attorney Scott Murphy, may be watching them.

After armor-piercing bullets are found on the black market, the team decides to send Officer Brandt on an undercover mission to catch the criminals selling them. Meanwhile, a task force led by Murphy's ex-husband threatens Gideon's future.

After a man goes to extremes to get justice for his daughter, Gideon and Martinez use new technology to investigate the case. Meanwhile, the assistant state attorney continues to interrogate Gideon and his ideas for the 13th district in the all-new.

After Gideon's father finds himself in trouble, he turns to Gideon for assistance. Meanwhile, Brandt and Goss work to track down the mastermind behind a huge grand theft auto case.

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 another fire hits one of the gang-run buildings, Murphy and Gideon find out that the cause is much worse than an act of gang retaliation. Meanwhile, Goss is unsure about Brandt's old service buddy, after he's accused of assaulting a customer at the bar where he's a bouncer. Goss seeks the truth and Gideon is faced with an important decision.

An FBI agent seeks Murphy's help when he learns his informant's life may be in danger. Gideon not only assists Murphy with the investigation, but makes a decision that could make or break his company. Meanwhile, the past comes back to haunt Ada.

When a serial rapist is on the loose, Captain Conrad orders Gideon and Murphy to find the perpetrator before there are any more victims. However, after Gideon's new technology fails to prove helpful for the case, the team is forced to turn to an unexpected ally for help. Meanwhile, Ada struggles with a threatening part of her past and worries that if it resurfaces, it may be harmful.