Hondo and the SWAT team race to stop a nuclear attack on Los Angeles when radioactive material is stolen from a local lab.

When two students are brutally attacked, 20-Squad contends with a possible honor killing. Meanwhile, Hondo and Nichelle have their first parenting dispute while searching for a suitable daycare.

When back-to-back shootings at women's clinics leave two healthcare providers dead, Hondo and the team investigate whether the shootings were politically motivated.

Tan is left reeling when his girlfriend is kidnapped, and 20-Squad must race to track down a violent cartel leader who may be behind the abduction.

A blackout throws the city into chaos, forcing 20-Squad onto the streets for an emergency patrol day, which quickly escalates when Hondo and team uncover a terror threat.

20-Squad faces down a prison hostage situation, only to be thrown into deeper danger when a bomb explodes, freeing maximum-security prisoners from their cells, including someone with a personal grudge against Hondo.

When a spree of brutal stash house robberies spills into L.A., 20-Squad must team up with the sheriff's department's gang unit to unmask a violent crew who leaves no witness alive.

SWAT tackles a mission with personal ties for Hondo when they race to find a group of missing students and their bus driver, Hondo's former high school football coach. Also, Hicks has reservations regarding Hondo's new 20-Squad team addition, Devin Gamble (Annie Ilonzeh), a cop with a family background deeply entrenched in crime.