CBS is a veritable "crime TV network", with one crime drama after another, one spin-off after another, and it seems that there will never be an end. Since CBS's signature dish "Crime Scene Investigation" (CSI) can spawn "New York" and "Miami", why can't CBS's other signature dish "NCIS" (NCIS) spawn something? Here comes "NCIS: Los Angeles". Friends who like "NCIS" are actually not unfamiliar with "Los Angeles" - the first two episodes of the show (named "Legends") have been inserted into the main drama of "NCIS" this season. "Los Angeles" mainly tells the story of OSP (Office of Special Project), a branch of the NCIS specializing in secret surveillance missions, fighting high-tech crimes, arresting the most dangerous criminals and maintaining national security. The members who join the team are all well-trained elite agents who use cutting-edge technology and various fake identities to work secretly. They hide so deeply that sometimes even their families don't know their true identities. In order to complete the mission, they ignore their personal safety and walk on the edge of life and death every day. Agent Callen (played by Chris O'Donnell), codenamed G, is a "chameleon". In order to penetrate the criminal organization, he can change himself into any "needed" image. His partner, Agent Sam Hanna (played by LLCO LJ), is a former Navy SEAL who has been tested in the most brutal actual combat in Afghanistan and Iraq. Hanna is also a surveillance expert and is good at using various cutting-edge equipment. When teammates performing field missions need help, he can always provide important intelligence that determines life and death in the first time. Callen and Hanna's direct supervisor is Agent Lara Macy (Louise Lombard), director of the OSP Office. She is responsible for the formulation, deployment and monitoring of planned tasks, and is responsible for making key decisions at critical moments. Agent Kensi Lo (played by Daniela Ruah) was ordered to assist OSP in carrying out operations. She is the daughter of a former Marine, extremely smart and passionate. Clinical psychology expert Nate Getz (played by Peter Cambor) is equivalent to the "think tank" of the group. He can not only easily break through anyone's psychological defenses, but also has keen observation and first-class judgment. He can quickly judge the mental and psychological state of suspects at different stages before, during and after the mission. In the high-end criminal field full of crises, OSP members can only rely on each other's help and excellent crime investigation skills to achieve one victory after another. [Tianya Xiaozhu]