The NCIS team must learn to work without Gibbs, who has retired; Ziva witnesses a political assassination and the FBI wants her.
In the aftermath of the Gaza attack, Bartlet proposes peace talks instead of military action even as he enters into a risky negotiation to have the terrorist leader responsible for the attack delivered into U.S. custody.
President Bartlet invites Israeli and Palestinian leaders to Camp David to negotiate peace, while Leo remains at the White House to give the OK to strike a terrorist training camp in Syria.
After Callen's cover is blown and it compromises the unit, the NCIS team races to find out who is behind the security breach.
Renegade Sloane has the secrets to a mysterious Rambaldi device; Vaughn begs Dixon to assist the CIA in rescuing Sydney.