Chris O'Donnell and LL Cool J star in "NCIS: Los Angeles," a spin-off of CBS's hit crime drama "NCIS." The main characters are the Office of Special Projects (OSP), a special team focused on high-risk undercover and reconnaissance missions. They will be responsible for high-risk criminals that endanger national security. Specially trained team members with various cutting-edge technologies and various identities will risk their lives to perform undercover missions to complete their goals. Agent "G" Callen has a chameleon-like identity-changing skill that allows him to blend into the world of various underground criminals. His partner, Agent Sam Hanna, is a former Navy SEAL who has performed missions in Afghanistan and Iraq and has high surveillance skills and has provided surveillance data to frontline soldiers. Assisting the team are Agent Kensi, who is cheerful and lively and comes from a military family, and psychologist Nate Getz, who is good at getting into anyone's head, analyzing targets and evaluating the status of agents. This team has appeared at the end of the sixth season of NCIS. The high-end equipment and tense cases have attracted the attention of the audience. With the addition of veteran actors such as Linda Hunt, the OSP team has gradually grown. The popular Abby and NCIS owner Leon Vance will also help in the spin-off series.