A death-row inmate tips the Hats to a group of killer cops, so the squad must compile evidence against the miscreants before they wipe the brothers out.
A mob hires a hit man to kill his son's girlfriend after she goes to the DA with potentially devastating information, and the Hats are called on to protect the woman and track down the killer.
Frustrated by a canine of detecting smuggled drugs, a drug lord puts a bounty on the dog's life. So the DEA sniffs out They Hat Squad to protect the dog, but the brothers can't help but sink their teeth into the larger case.
The squad must sharpen its skills to track down a twisted heir to a razor fortune who stalks a young female witness to his latest killing. Meanwhile, Raffi is mistaken for the ""Kissing Bandit"".
Buddy travels to Las Vegas as he tracks a mob boss he thinks murdered his natural father. But the killer is closer to home, as is someone who has a contract to kill buddy.
Bad brothers blow away Buddy's buddy, leaving a young boy father less, so the Hats scramble to confront the hit man before they leave town.
It's a family feud when the hats clash with a family of ex-terrorist that uses strong-arm tactics; an additional obstacle: saving the family's tormented youngest member from a life of crime.
The guys must act quickly when a deranged explosives expert escapes from prison and targets Mile, the cope who put him behind bars for murder.
Raffi goes undercover to protect a little girl when her father is forced out of his retirement from crime by a robber planning a $2 million subway heist.