When Olivia and Elliot discover a kidnapped girl in the trunk of a stolen rental car, they are led to her violent, schizophrenic abductor. The case forces Casey to face the reality of her own dark past.
A young girl's death seems to be linked to the world of ultimate fighting. However, after questioning a professional fighter, detectives find the evidence trail leads to two young brothers who have a few skeletons in their closets.
When a family's nanny is found gruesomely murdered, the obvious suspect is her Internet love interest. It soon becomes apparent that her employers are hiding some dark secrets, and the investigation leads to a case of murder and infidelity.
A wealthy family of coffee traders comes under suspicion when a pregnant woman is found raped and dead in her burnt loft apartment. Detectives Stabler and Benson unveil a web of family secrets including conspiracies, sex, and blackmail.
When a teenage boy confesses to looking at a website to try to curb his paedophilic urge, Benson and Stabler investigate the 'self-help' website for pedophiles and its creator, Jake Berlin. When the teen goes missing, the detectives race to find him.
Stabler's job and personal life become intertwined when his daughter becomes a crime suspect. He must decide how far he will go to save her and Benson is compelled to step in to help before things take a turn for the worst.
After famous astronaut Marga Janssen's corpse is found afloat in the waters of Battery Park, Detectives Stabler and Benson initially believe the murder is linked to a string of rapes. Stabler turns to his old mentor for help with the investigation.
An athlete is the victim of sexual assault, but her secret double life could ruin both the case against her attacker and her Olympic future. Meanwhile, Rollins reconnects with her sister, Kim, when she is released on parole.
Athena investigates a mysterious murder during a neighbourhood block party and the 118 rush to save lives endangered by a bomb threat. Meanwhile, Chimney has a hard time keeping secrets when Maddie and Buck's parents come to town.
The 118 race to save the lives of workers trapped in a five-alarm factory fire. Meanwhile, Maddie reveals a painful family secret that causes Buck to confront his childhood and answer why he is the daredevil he is today.
The 118 rush to save a man pinned under a Humvee, and a garage band that rocks out too hard. Enlisting Bobby and Athena's help. Meanwhile, Hen's mother unexpectedly arrives and announces she is moving to LA.
The 118 are called to the tarmac when a flight attendant reaches her limit with her flight's passengers. Athena discovers that quarantine has pushed a couple to their breaking point. Meanwhile, Eddie worries Christopher will not accept him dating.