The BAU travels to Chicago to investigate an unsub who leaves red roses on each victim. Also, Rossi gets an unexpected visit from his ex-wife, Krystall Richards.

The members of the 118 race to the rescue of a social media influencer when she has an accident in a sauna, then to an emergency at a reality show wedding, and finally a tragedy when a mother and her daughter go hiking. Meanwhile, Maddie worries she has missed too many firsts with Jee-Yun, May questions Athena's career path and Hen and Karen attempt to recapture the fun in their relationship.

The 118 races to the rescue when the 9-1-1 Call Center goes up in flames. Then, Bobby risks his life to save a trapped May and Claudette, Buck and Eddie work together to help an injured electrician and Chimney and his brother team up as firefighters for the first time.

The Saviors raid Hilltop unexpectedly, forcing Daryl and Maggie into hiding; they leave with Dr. Harlan Carson in tow to replace his now-deceased brother as their doctor. While sneaking into the Sanctuary on a suicide mission, Sasha and Rosita encounter Eugene and urge him to escape, but he refuses. Sasha then locks Rosita out, telling her to go back to Alexandria because the group needs her. As Sasha breaks into the Sanctuary to kill Negan herself, Rosita flees and notices someone watching her.

Tara leads the group to Oceanside in hopes of convincing the community to join the fight against the Saviors. Natania refuses to have her people fight, but ultimately allows Rick's group to take their guns. Sasha is held prisoner at the Sanctuary, where Negan tries to convince her to join the Saviors. She confides in Eugene and asks him for a way out; he gives her one of the poison capsules he made. Upon their return to Alexandria, Rick's group is greeted by Rosita, who after running into Dwight while fleeing the Sanctuary, reveals Dwight's intentions of helping take down Negan.

Negan and the Saviors travel to Alexandria with Sasha in a coffin as a gimmick to confront Rick. On the way, Sasha commits suicide with the poison capsule Eugene gave her. At Alexandria, the Scavengers double-cross Rick's group, revealing they've been dealing with Negan all along. After a standoff, a gun fight ensues, with the unexpected arrival of Kingdom and Hilltop fighters forcing Negan and the Saviors and Scavengers to retreat. Alexandria, the Kingdom, and Hilltop are hit badly, but are prepared for an all-out war against their enemies, while the undead Sasha is put down by Maggie and Jesus.

Lou's bar mitzvah doesn't attract many guests, so M.O.D.O.K. is forced to invite the villains and creatures he's met along the season. Young M.O.D.O.K. attacks and puts the family in a precarious situation before taking M.O.D.O.K. into the time stream. Young M.O.D.O.K. reveals that if M.O.D.O.K. truly wants to take over the world, his family has to die. M.O.D.O.K. is forced to make the toughest decision of his life.

The plan involving Alexandrians, Kingdommers and Hilltoppers unfolds. As Rick continues to fight, he encounters a familiar face.

Conflict with the Saviors leads to unintended consequences for the Hilltop, the Kingdom, and Alexandria. Morality proves tricky in wartime.

A new weapon in the Savior arsenal proves to be a giant hurdle as fighting continues between Rick's forces and those of the Saviors.

A close look at Negan and the lives of the Saviors during the conflict through a familiar set of eyes.

With things looking up for Rick and the group, an argument breaks out at the Hilltop; the consequences of the decision are life versus death.

Emergencies include an accident at a grain silo and a steak eating contest, plus an unusual home intruder; Owen helps Michelle uncover new information about her sister's disappearance.

A massive tornado sweeps through Austin, as Owen, Michelle and their teams races to save those in its path.

The BAU is called to Oklahoma to investigate a murderous clown terrorizing the sleepy town of Guymon.

The BAU travels to Chicago to investigate an unsub who leaves red roses on each victim. Also, Rossi gets an unexpected visit from his ex-wife, Krystall Richards.

Brennan is shot while working late at the Jeffersonian lab and is rushed to the hospital in critical condition. While at the hospital, she struggles with visions of her mother that defy her usual logic.

The Jeffersonian team investigates the murder of a TV producer. Meanwhile, Brennan has trouble accepting the fact that Christine might be an "average" child when her daughter gets accused of biting another classmate.

The team investigates the death of Symchay Conteh, a young man whose remains were found in a barrel at a hazardous waste disposal facility.

The team are called in after a crossword puzzle master is discovered in an urban fracking site.

The BAU team's investigation into the home invasion and attempted homicide of a police chief's wife uncovers a world of secrets in a small town in Virginia.

The BAU is called to New York when several casualties of a brutal nature are reported in Central Park.

The BAU takes charge of a hostage situation at a law firm in D.C., where Matt Simmons' wife, Kristy, works.

The Centers for Disease Control calls on the BAU when they suspect bioterrorism is behind a series of mysterious deaths in Virginia. Also, Garcia visits her stepbrother, Carlos, to take care of a difficult family issue.

Owen and the crew race to a brawl at a male strip club, a fire at a bull semen factory and a protest where male toxicity is taken to a new level. Meanwhile, Paul tentatively goes out on a first date, Grace tries to reconnect with Judd and Owen faces the consequences of his chemo.

Emergencies include a ride-share trip gone awry, a farming accident and a memorial service that may turn into another funeral. Owen unexpectedly bonds with the former Captain of the 126, while Marjan and the crew help Mateo try to pass his written exams.

The team investigates the murder of Jack Spindler, a successful employee at a brokerage firm by day but a stripper by night.

The team rushes to prevent a viral outbreak while investigating the murder of journalist Mia Garrett after her infected body is found at a biohazard facility.

Ryan Murphy, Brad Falchuk and Tim Minear reimagine the procedural drama with "9-1-1." The series explores the high-pressure experiences of first responders -- including police officers, firefighters and dispatchers -- who are thrust into the most frightening, shocking and heart-stopping situations. These emergency responders must try to balance saving those who are at their most vulnerable with solving the problems in their own lives. The show draws from real-life, high-pressure experiences of first responders who regularly face heart-stopping situations that are often unpredictable, intense and uplifting at the same time.

Owen and the crew race to a brawl at a male strip club, a fire at a bull semen factory and a protest where male toxicity is taken to a new level. Meanwhile, Paul tentatively goes out on a first date, Grace tries to reconnect with Judd and Owen faces the consequences of his chemo.

Ryan Murphy, Brad Falchuk and Tim Minear reimagine the procedural drama with "9-1-1." The series explores the high-pressure experiences of first responders -- including police officers, firefighters and dispatchers -- who are thrust into the most frightening, shocking and heart-stopping situations. These emergency responders must try to balance saving those who are at their most vulnerable with solving the problems in their own lives. The show draws from real-life, high-pressure experiences of first responders who regularly face heart-stopping situations that are often unpredictable, intense and uplifting at the same time.

Emergencies include a ride-share trip gone awry, a farming accident and a memorial service that may turn into another funeral. Owen unexpectedly bonds with the former Captain of the 126, while Marjan and the crew help Mateo try to pass his written exams.

The members of the 118 race to the rescue of a social media influencer when she has an accident in a sauna, then to an emergency at a reality show wedding, and finally a tragedy when a mother and her daughter go hiking. Meanwhile, Maddie worries she has missed too many firsts with Jee-Yun, May questions Athena's career path and Hen and Karen attempt to recapture the fun in their relationship.

The 118 races to the rescue when the 9-1-1 Call Center goes up in flames. Then, Bobby risks his life to save a trapped May and Claudette, Buck and Eddie work together to help an injured electrician and Chimney and his brother team up as firefighters for the first time.

After a mysterious death, Hen and Chimney put their lives in danger when they suspect that someone is playing God to make themselves look like a hero. Meanwhile, Eddie visits Texas, where he attempts to reconcile with his father.