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.

The squad races to find a missing child who was abducted from her front yard; Hicks is faced with a difficult decision concerning Gamble.

S.W.A.T.'s anti-terror sting operation at a bus station is thrown into chaos when felons, fleeing the police, burst in and take the bus station hostage; Bennett redoubles her efforts to force Hicks out as S.W.A.T.'s commander.

When a violent shooting rocks a Los Angeles nightclub, Hondo and 20-Squad are thrust into the dark world of sex trafficking, going head-to-head with a notorious biker club as they race to find a missing girl.

After an explosive accident at a fruit-packing facility staffed by prison workers, six inmates escape and scatter across the city. Tasked with chasing down the fugitives, Hondo and 20-Squad discover that the worksite explosion was no accident, and that the escapees are working together to carry out a high-stakes robbery. Also, Commander Hicks packs up his office, preparing to vacate the SWAT commander's post, and Gamble gets sobering news about her jailed father.