Walter, Cabe and Happy become trapped in a top-secret submarine with a limited oxygen supply and the potential to self-destruct after an explosion propels it to the bottom of the ocean.
The National Guard's plan for the neighborhood and its residents is revealed, forcing Travis and Madison to make a difficult decision.
Madison and Travis witness different sides of the National Guard's occupation of their neighborhood.
Terry and Hildy find themselves investigating people within their own department. Jamie digs into Dustin's past. Suger searches for answers as someone close to him disappears, then makes a shocking discovery.
Raffi fears that Hildy's continuing murder probe will impact her own case against Sugar. Meanwhile, a defense team enlists acclaimed attorney, Jamie Nelson, and emerging evidence suggests that an inspector was murdered.
With the city reeling, newly appointed District Attorney Mario Siletti promises justice. Elsewhere, the body of a young Chinese gang member found in an urban grow house sends Hildy into the dangerous world of drugs and gang politics.moreless
Tensions mount when the manhunt proves to be more difficult than expected. Terry is promoted to acting lieutenant and soon discovers the job comes with responsibilities more challenging than he expected.
When a couple of students open fire on a school bus in the center of the city, SFPD Detectives Terry English and Hildy Mulligan must work quickly to put an end to the threat.moreless
Benson and Rollins deal with the fallout after a rape suspect is released due to no evidence and the rape victim's father takes justice into his own hands.
Team Scorpion try to save a boy on Christmas Eve when he gets trapped in a beach-side cave and the rising tide threatens to drown him.
Three convicts break out of prison and the investigation reveals that one of the escapees is a brilliant hacker who is being forced to help the other two steal billions of dollars online. Meanwhile, Paige tries to manage expectations for Ralph when his father returns.moreless
The aftermath of the Erich Blunt verdict finds the department probing a new death swirling around a drug-addled socialite and her husband. Meanwhile, it's discovered that witnesses from the Kevin Neyers case have recanted their original statements.moreless
Six months has passed and Erich Blunt goes on trial for the murder of Cindy Strauss. While Terry makes a decision to atone for his behavior, Hildy hooks up with his ex-husband, Mike, with the lure of renewing their romance.moreless
Erich takes Ivana and runs off for a drug-fueled weekend, even though his lawyer advises against it. While Hildy deals with the ramifications of the shooting and the possibility that she might lose her job, Terry does his best to get her out of trouble.moreless
Callie worries about her future and Jude after she encounters her father. Jesus tries to stay focused without his ADHD medication, and Mariana gets an invitation from Zac's mother. Lena and Stef make a big decision.moreless
With a new RV the family plans to spend more time together as Molly gets closer to her mother. Miguel and Lisette discover something about one of Demetrio's teachers.
Suspicions come up when the son of Sean's old associate commits suicide. A killer targeting family members of former Secret Service agents folds into King and Maxwell's investigation.
It seems every gang member in the basin will show up for a drug lord's funeral, and the officers must deal with the resulting free-for-all on the streets. Ben Sherman makes the decision for Sammy Bryant about the tape, but does not expect the results the decision brings. Lydia Adams and Ruben Robinson work the murder of Sgt. Hill's son, but disagree on how to handle the evidence that incriminates another officer. Elsewhere, John Cooper's isolation feeds his depression.moreless
John Cooper's new boot, an Afghanistan war veteran, rubs him the wrong way. Lydia Adams grapples for the perfect balance of work and parent responsibilities. Elsewhere, Sammy Bryant files for custody against Tammi, and Ben Sherman hooks up with a new cop who has a dangerous attitude.moreless
The tables are turned when Sheriff Lamb must protect Savino after Milwaukee puts out a hit on the mobster.
Hank goes back to investigate a closed case he handled of a murderer sentenced for execution who claimed that he acted in self-defense when a monster attacked him. Meanwhile, Monroe has an unusual situation come up at the spice shop.moreless
An cold case unsolved for twenty years about the disappearance of a young boy suddenly heats up again when the main suspect in that long ago crime is found dead.
Savino and the local Milwaukee mob both set their sights on acquiring the Tumbleweed Casino which brings out a taste of the real Vegas heat. Sheriff Lamb's investigation into the hit-and-run killing of a casino maid reveals an unlikely connection to one of the town's wealthiest businessmen.moreless
Mike and Lydia work to get the methylamine delivered for the operation. Walt and Jesse try to work through several ideas to keep undercover.