Hondo puts aside his misgivings about Jim Street's recklessness and allows the newbie to go undercover as a broker in a luxury car theft ring to bust a ruthless trafficker. Also, Hondo visits Raymont Harris, the teenager recently shot by a former member of the SWAT team, who is dealing with PTSD. [also shown as S1:E5]

Hondo and the team go on the hunt for a serial killer who escaped justice two years prior by faking his death. Also, Hondo worries that Buck Spivey, the team’s former leader, is spiraling into depression in the aftermath of being fired from the department.

The SWAT team races to find a stalker pursuing a social media star, after the online celebrity's dangerous admirer turns a fan event into a shootout that endangers Jessica.

The SWAT team faces difficult reminders of a past school shooting when they receive a warning that a copycat plans to re-enact the crime. As the team races to stop the new threat, they flash back to the day of the tense first mission.

Lt. Lynch pulls the SWAT team’s focus when the mayor tasks her with enacting a departmental review of the squad right as they pursue the unstable and dangerous fugitive leader of an infamous doomsday cult. Meanwhile, Luca asks the team to invest in his new passion project, a Guatemalan food truck.

The SWAT team joins forces with the Los Angeles Organized Crime division to recover an officer abducted during a failed undercover operation. Also, Chris struggles with how to comfort the kidnapped officer’s parents when she is restricted from giving them certain details of the investigation.

Hondo and the SWAT team race to save Buck, their former unit leader, when he goes off grid and they fear he plans to harm himself. Flashbacks reveal the search for Buck, which coincides with one of the team’s most brutal missions, as each team member receives counseling and discusses the untold mental and emotional difficulties inherent to working in SWAT.

The SWAT team searches for a group of drug smugglers who crash a plane in a Los Angeles suburb and scatter, after a joint mission with the DEA to stop the shipment goes awry. Also, Hondo tries to make amends with Nichelle, Luca experiences anxiety about his return to the field, and Deacon hesitates when asked to speak to a group of recruits about mental health.

Hondo is conflicted when the mayor asks him to be the public face of a new outreach campaign meant to improve the LAPD's stature within the Black community. Also, the team's search for a lone bomber reminds Tan of a difficult chapter in his childhood, and Chris pushes herself even further to surpass Street and Tan in a SWAT leadership competition.

A tragic mission leads each member of the SWAT team to contend with their emotional distress in varied ways.

As the team races to stop a violent band of armed robbers, the search is complicated by civilians using a public safety app that encounters vigilantism; Street receives difficult news that alters his future.

When the team busts a group of dangerous robbery suspects; Tan is confronted with a pivotal figure from his past; Luca is tapped to temporarily stand in for Hicks.

The team races to stop a violent rampage with ties to a painful chapter from Hicks' past.

When a female robbery crew "honeytraps" and kills several rich VIPs, Hondo and 20-Squad are called in to assist FBI Agent Jackie Vasquez in capturing the dangerous fugitives before the death toll rises. Commander Hicks is shocked when his new love, Maggie, abruptly ends their relationship without rhyme or reason. With help from Deacon and Dr. Wendy, Hicks makes an important decision about his romantic future.

When three of L.A.'s finest are targeted and gunned down in the street, the team enlist the help of an LAPD psychologist to stop a murderous rampage, reopening old wounds tied to the department's failed response to a school shooting.