The Unit, Season 4

Jonas and the team are assigned the task of unraveling an assassination plot involving high government officials at the same time as the women are being secretly relocated from the base for their own safety.

The team follows a scientist on a commercial flight, who they believe will be the next target of terrorists they hope to link to a presidential assassination plot at the same time as their wives are relocated and given new identities back home.

Jonas vows to help save a group of girls who are being trafficked as sex slaves by the man he hopes will lead the team to a nuclear weapons smuggler they are trying to find.

Bob is held hostage by a drug cartel after he poses as a chemist who can turn cocaine into paint for easy smuggling. Meanwhile, Mack penetrates the group posing as a prize fighter in an illegal betting ring to help bring them down.

A nuclear scientist insists on making a deal with the team before he will reveal vital information about a terrorist attack in a major U.S. city. Back home, Molly, Kim and Tiffy are drafted into service to work undercover with Jonas.

The team produces fake evidence of an attack to con a terrorist into exposing his accomplices before the truth comes out and they can get away. At home, Mack wants Tiffy to reveal details about her relationship with Ryan.

Jonas and the team make getting his daughter, Betsy, returned their top priority when she is kidnapped in Iraq. Also, Mack is considering his revenge toward Ryan for having an affair with Tiffy.

While Jonas and the team continue to try to rescue his daughter, Betsy Blane, from Syrian captors, Mack has the opportunity to carry out his revenge on Ryan for his affair with Tiffy.

Jonas and the team must go through enemy territory to bring a young bride to her groom in order to preserve a truce between two warring Afghanistan tribes. At home, Bob and Kim work together to expose a man who is linked to terrorists.

The team's efforts to raid an anthrax lab are thwarted by an official who thinks his high-tech intelligence is superior to their field logic. At home, Kim's life is in danger when her boss commits a murder and forces her to help get rid of the body.

Jonas and the team make a Dept. of Defense official, whose bad judgment caused a mission to fail, go on an assignment with them where he will experience the realities of war first hand. Back home, Kim is secretly reunited with her children.

Jonas plays a game of high stakes baccarat to win back the services of a CIA spy who has gone over to the other side. His success is also key in getting court martial charges against team member Bridget Sullivan dismissed.

Jonas and a seriously wounded Mack take refuge in a monastery where he is ordered to steal the monks' most prized possession. Back home, Bob is asked to perform a dangerous mission that will reveal the darkest side of his job to Kim.

The President orders the unit to capture a Nazi war criminal from his hiding place and deliver him to The Hague. In Washington, Tom Ryan confronts his past when he is offered a promotion to General.

As Jonas coaches Betsy before her military-ordered media tour, the Unit initiates a new team member.

Unable to communicate with the outside world, the Unit and their families must survive when a deadly gas poisons anyone in their community who steps outside.

As the Unit fights to rescue Jonas's old friend, a broken helicopter gas tank and nearby guerillas impede their mission. Meanwhile, Tom goes to extreme measures to extract information from a recovering alcoholic whose husband may have been behind a terrorist attack.

The mission's plans go awry and Bob must run interference when Jonas and Mack are undercover to find the terrorists who killed the Vice President.

When Sam attacks Bridget, the other members of the Unit must hunt him down.

A random incident throws Jonas and Bob's carefully planned mission into chaos.

While Jonas is tracking down a Russian terrorist cell, a kidnapped Molly is used as bait.

The Unit must locate and diffuse three sets of dirty bombs headed for unknown locations across the United States.  Meanwhile, the team prepares for a wedding of one couple and the end of a marriage for another.