
Michael is being held by the organization that burned him. His new handler, Vaughn, needs his help to catch an arms dealer involved in an international war for profit scheme. Mike is released in Miami, where he finds life has continued without him. Sam and Fiona have partnered to help Winston, a lawyer who has been marked for death by the Breakers, the most dangerous biker gang in South Florida.

Vaughn intends to torture burned spy Jesse Porter, but Michael convinces him to he can win his confidence instead. Thus the team agrees to help Jesse deal with his nemesis, arms dealer Ming Khan, who believes Jesse stole a fortune from him. Michael pretends to be Jesse's enemy too, so Khan will accept him as ally. Hothead Jesse complicates things further, so he'll need a hiding place, while ma Weston has decided to look for a boarder.

Michael takes on the mob at Miami's docks, where a port worker is being threatened by the group. Elsewhere, Michael and Jesse gather intel on an underground artillery operation on the waterfront.

While Jesse and Fi try to gather information on a dead gunrunner, Michael and Sam are caught in the middle of a hostage situation while trying to help a man who lost his charity's money to a con artist.

A reluctant doctor turns to Michael for help when a group of vicious drug dealers terrorize his neighborhood clinic. Michael is drawn into a game of cat and mouse with a killer.

While Michael and Fi try to foil the heist of a priceless antique sword, Sam and Jesse try an interrogation trick to get information out of Kendra.

Michael helps a former Cold War spy who has been targeted by Russian operatives, while Fi helps Jesse get a chance to speak with his old boss about who burned him.

Michael, Sam, and Jesse must try to rescue Fiona when their plan to protect a wealthy business bigwig at his house party go horribly awry. Meanwhile, Michael and Jesse need Madeline's help in order to rob a bank.

In the aftermath of a hurricane, Michael poses as a hitman as part of his plan to protect a federal witness, and is forced to turn to Vaughn so that he can speak to Simon about the coded Bible.

Michael must find his way into a high security prison to keep watch over Sam's inmate friend, whose life is endangered by another prisoner. Elsewhere, Michael interrogates Simon in order to gain more information on the cipher he found.

Michael helps a victim of a womanizer's scam, which depleted her life savings.

Michael tries to find a kidnapped girl who was taken by a client of her defense-attorney father's.

Michael tries to prevent a bombing arranged by a lawyer out for revenge against a local gang. Elsewhere, Michael and Jesse must track down a highly sensitive document that's been stolen.

A dangerous thief tries to steal a chemical weapon from Venezuelan revolutionaries, forcing Michael to work with his foe to prevent a disaster.

Nate tries to locate a stolen car filled with drugs but soon gets in over his head, prompting Michael to step in. Elsewhere, Sam and Jesse set out to prevent the sale of a highly sensitive government document in the Dominican Republic.

Sam tries to help a friend who's been deemed a dirty cop clear his name. Elsewhere, Michael plans to meet with Jesse's former handler in order to make sure government documents end up in the right hands.

Brennen attempts to blackmail Michael into killing government agents and joins forces with another player to strengthen his strategy.

In the Season 4 finale, a tactical-assault team descend on Miami to come after Michael and his loved ones, forcing Michael to take drastic action to keep everyone safe.