Grimes comes to Carter with information that might lead them to the terrorists. Meanwhile, at the Donovan compound, Nilaa is sequestered and questioned by Rebecca.

Carter and Grimes try to make a deal with the leader of a smuggling ring in order to find out the location of the terrorists for whom they've been searching. Meanwhile, Amira and Khasan get a visit from an unexpected guest, while progress is made on the leak.

Andy uncovers important information about a high-ranking government official, leading Carter and Donovan to team up and find out more. Meanwhile, a reinforcement is brought into CTU to oversee operations.