A locally born SWAT sergeant, former Marine Daniel “Hondo” Harrelson, is newly tasked to run a specialized tactical unit that is the last stop in law enforcement in Los Angeles.

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.

When hospital employees are targeted by a gunman, the SWAT team races to find a grieving father whose son was denied a kidney transplant; Hondo searches for evidence behind an alarming rise in Los Angeles stash houses.

When a cop on the verge of shutting down a major drug operation is abducted, Hondo and the squad race to save one of their own before it's too late; Luca grows concerned about sudden changes in Hicks' behavior.