Hondo, a S.W.A.T. lieutenant, is torn trying to balance his loyalty to the streets, where he was born and bred on one hand, and his colleagues and job in running the crime-solving unit on the other hand.
The team competes with another rival team on finding four escaped convicts. Meanwhile, Hondo's position as leader is questioned when Street ignores protocol.
The team is on the look for a notorious drug trafficker who uses immigrants as couriers. Meanwhile, newbie Jim Streets risks his position on the team.
A local terrorist is killed in an explosion, and the S.W.A.T. team are racing to find his partner before more damage is done.
A number of homes are invaded by S.W.A.T. imposters in an upper-class neighborhood and Hondo's team suspect the victims are keeping something from them.
Hondo pays a visit to a PTSD-addled teenager, Raymont Harris, who was shot by an ex-S.W.A.T. team member. He also assigns an undercover mission to Jim Street.
Hondo's friends are involved in gang violence, and his imprisoned friend asks him to protect for his son during the aftermath of the incident.
The team's plans to enjoy Christmas with their families are halted when presented with a drug case, while Jessica has new ideas to enhance the division.
Hondo is taken off active duty when someone files a misconduct complaint against him, and Deacon becomes in charge of leading the unit in arresting a crew of robbers.
A riot breaks out in a prison and civilians are taken hostage, but Hondo suspects there's a hidden motive.
In order to take down a drug-smuggling ring and reveal its leader, Hondo joins forces with an old friend in the DEA.
Hondo and the unit join forces with the FBI to make sure a terrorist attack involving cyanide gas doesn't happen.
After the arrest of an illegal immigrant, S.W.A.T clashes with the people supporting the immigrants.
Hondo's team are on the look for a serial killer who faked his own death. Meanwhile, Buck is depressed after his firing.
Hondo's friend is killed during a mission to stop a robbery crew, and it becomes a personal matter to him, getting things out of control.
The team search the city for an abducted heiress, while Mumford announces his fourth marriage, which alarms the team.
While working to handle a hostage situation, things take an alarming turn which affects the whole unit.
Hondo is faced with his turbulent feelings for his father when he and his sister confront him that he's not fit to live by himself.
Hondo and the unit are tasked with the security of a high-profile journalist from Russia visiting Los Angeles.
Hondo's career is in jeopardy when his unauthorized surveillance of the man who kidnapped his godson is found out.
Following an ambush, Hondo and Deacon are chased by armed mercenaries in the Angeles Mountains and must use all their S.W.A.T. training skills.
A fake 911 call has Hondo and his team on the hunt to put an end to bombing attacks. Meanwhile, Jessica is given shocking news by the president by the police commission.