When the team's armored vehicle is stolen, they must stop the vehicle from being used in a potential terrorist attack; Hondo and Nischelle prepare for their baby's gender reveal party.

The team participates in a joint task force with the FBI when a car bombing has ties to a terrorist group planning an attack in Los Angeles; a tragedy from Deacon’s past gives insight into the origins of his faith.

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.

SWAT faces their deadliest adversary yet when a violent cell of extremists looks to extract vengeance by blowing up half of Los Angeles, potentially killing thousands.