: A rescue mission goes wrong, resulting in the death of Hector Williams.
: The show continues its focus on the "Unit family," showing how secret missions impact the wives. This season includes Kim Brown’s difficult pregnancy and Tiffy Gerhardt facing personal victimization.
: In a pivotal mid-season arc, SFC Hector Williams is killed by a sniper during a mission in Beirut, leading to a revenge mission by Jonas.
: Jonas seeks revenge for the fallen Williams while the team copes with the loss.
: Embassies are under attack in Abidjan while Jonas's daughter decides to enlist.
: Grey goes undercover to infiltrate a gang stealing military explosives.
: The team guards a pop diva in Iraq while dealing with a foreign prisoner's execution.