An enigmatic woman with a mysterious background uses her extensive skills to help those with nowhere else to turn.
McCall saves the team after they're put in danger by a former colleague and discovers the truth behind the CIA withdrawal in Venezuela. (S4, ep 1)
After a girl is struck by a car in an illegal street race, McCall tracks down the person responsible. Dee contemplates joining the army. (S4, ep 2)
After a high-powered real estate developer is killed by a moving subway train, his widow hires McCall to investigate his death. (S4, ep 3)
Dante's old training partner is taken hostage in a casino, so McCall hires JJ, a former gambling addict, for the rescue mission. (S4, ep 4)
Mel reunites with brother Matthew and McCall helps him expose his former unit's wrongdoings. (S4, ep 5)
When a former Chinese agent is poisoned and comes to McCall for help, she must track down the perpetrators and find the antidote. (S4, ep 6)
Dee asks McCall to help find her transgender friend when the teen goes missing. Dante is surprised when Big Ben's parole officer asks for a favour. (S4, ep 7)
McCall helps Dante and Big Ben after they are ambushed by attackers and a family secret is revealed. Aunt Vi defends her crown at a baking contest. (S4, ep 8)
When a conman from Dante's past appears, McCall and the team race to take him down. Aunt Vi and Dee find a woman squatting in their home. (S4, ep 9)
The team helps Mel after she is kidnapped by a member of her support group. Dante is offered a position with the Special Investigation Unit in LA. (S4, ep 10)