Scott and Stonebridge are recalled from holiday in California to capture Leo Kamali, a high ranking member of a terrorist cell led by al-Zuhari, an elusive terrorist. After capturing him in Colombia it is revealed that Kamali is working deep cover with the CIA to stop al-Zuhari. As Kamali is pressured to work with Section 20, Dalton is suspended by Colonel Philip Locke, who takes charge. Dalton is later killed by the Real Irish Republican Army (IRA), who have joined forces with al-Zuhari's group. In the meantime, Scott and Stonebridge are wanted by the Russian mafia after killing the son of mob boss Arkady Ulyanov in Colombia.

Season 4 Episode 9 - Episode 9

Scott and Stonebridge try to keep their promise to protect Ester; Richmond and Martinez follow an Al-Zuhari associate; the team sets out to stop an infiltrator before he reaches a populated area. Air Date : 11th-Oct-2013

Season 4 Episode 1 - Episode 1

Enjoying a long-deserved vacation, Scott and Stonebridge are recalled after a fellow Section 20 member dies while pursuing the elusive terrorist al-Zuhari in Beirut. A new lead sends them into the remote jungles of Colombia in pursuit of a known associate of al-Zuhari’s and deep in territory controlled by a powerful drug cartel. Air Date : 9th-Aug-2013  Read More

Season 4 Episode 2 - Episode 2

Out of options and hunted by the resourceful cartel, Section 20 goes for a longshot and attempts an assault in downtown Bogota, hoping to obtain intel on one of al-Zuhari’s key people. Meanwhile, Dalton looks for the source that exposed her team in Beirut, but discovers a surprising ally and a piece of al-Zuhari’s plan. Air Date : 16th-Aug-2013  Read More

Season 4 Episode 3 - Episode 3

Although they are uncertain of others’ loyalties, the team must work with an asset in Beirut to get a lead on James Leatherby, a dangerous and unpredictable operative with ties to al-Zuhari. Air Date : 23rd-Aug-2013  Read More

Season 4 Episode 4 - Episode 4

Section 20 attempts a risky rescue for a potential new ally. Now veering close to the edge, but determined to find the truth, Dalton goes AWOL with a detainee. Air Date : 6th-Sep-2013  Read More

Season 4 Episode 5 - Episode 5

While recovering from a shocking turn of events, Section 20 faces a different threat: a new enemy joining forces with an old one. Locke draws Kamali in closer to the team. Scott looks for an old friend, while Stonebridge gets closer to a new one. Air Date : 13th-Sep-2013  Read More

Season 4 Episode 6 - Episode 6

Section 20 is torn between devoting their resources to the mission or saving one of their own. Stonebridge's health continues to affect him in the field. Al-Zuhari's network moves forward quickly, striking close. Kamali explains why yet another threat is emerging. Air Date : 20th-Sep-2013  Read More

Season 4 Episode 7 - Episode 7

The team tracks stolen property to Russia, where Scott and Stonebridge continue their side careers as "outlaws." As Stonebridge's health continues to deteriorate, they discover new mysteries about a piece of Al-Zuhari's plan. Kamali worries that his cover identity may not hold. Air Date : 27th-Sep-2013  Read More

Season 4 Episode 8 - Episode 8

Scott looks for an escape from Black Bear Prison, while Locke becomes suspicious of Kamali. The team races to locate Stonebridge, whose condition grows more dire when he encounters Al-Zuhari's plan firsthand. Continuing his vendetta, Ulyanov closes in on Scott and Stonebridge. Air Date : 4th-Oct-2013  Read More

Season 4 Episode 9 - Episode 9

Scott and Stonebridge try to keep their promise to protect Ester; Richmond and Martinez follow an Al-Zuhari associate; the team sets out to stop an infiltrator before he reaches a populated area. Air Date : 11th-Oct-2013  Read More

Season 4 Episode 10 - Episode 10

Scott and Stonebridge face a new pivotal player in Al-Zuhari's plan, and with an imminent attack looming, the team resorts to questionable measures, sparking conflict within the unit. Air Date : 18th-Oct-2013  Read More