When Gideon is blamed for recent terrorist attacks, he and Capt. Conrad attempt to track down the real culprit; Danny continues to use his technological skills to disrupt the city.
After Gideon’s life is threatened, Conrad sends him home to get away from District 13; Murphy discovers the reason why Gideon is in danger.
Capt. Conrad orders Gideon and Murphy to catch a serial rapist before there are any more victims; Ada worries that a dangerous part of her past might resurface.
Last Train to Europa
An FBI agent seeks Murphy’s help after learning his informant’s life may be in jeopardy; Gideon makes a decision that could make or break his company; the past comes back to haunt Ada.
When another fire hits one of the gang-run buildings, Murphy and Gideon discover the cause is worse than an act of gang retaliation; Brandt’s old service buddy is accused of assault at the bar where he works; Goss seeks the truth.
Murphy and Ada team up to solve a murder; After learning of a safety risk during a company’s technology convention, a high-tech scanning system is utilized to try and track down the killer.
Gideon’s father finds himself in trouble; Brandt and Goss try to track down the mastermind behind a huge grand theft auto case.
Above & Beyond
After a man goes to extremes to get justice for his daughter, Gideon and Martinez use new technology to investigate the case; the assistant state attorney continues interrogating Gideon.
Officer Brandt’s undercover mission to catch the criminals selling armor-piercing bullets on the black market goes awry; a task force led by Murphy’s ex-husband threatens Gideon’s future.
Hate of Comrades
A security guard who used to be a cop uses the APB app before he is killed by robbers; Gideon redesigns a feedback chair to use in the investigation room; Murphy learns that her ex-husband may be watching them.