The Handler premiered on CBS in fall 2003. The Handler is about Joe Renato, an FBI agent who trains and handles agents who go undercover to solve crimes at all levels of Los Angeles' diverse society. From underground prostitution rings and drug traffickers to the worlds of high-tech and high finance, it's a behind-the-scenes look at how Joe's well-schooled operatives infiltrate and tackle them all. Joe is the ultimate "puppet-master" who also interfaces with government and local law enforcement agencies that come to him for help with both long-term and quick sting operations. He knows from personal experience that going undercover is an all-or-nothing job. Any lapse in "character" can mean the difference between life and death for his operatives, and Joe goes to great lengths to make sure his people are properly prepared, mentally and physically. He tirelessly directs a revolving cast of characters, including Lily, a wide-eyed rookie undercover agent; Darnell, the ambitious veteran; Heather, an enthusiastic transfer; and Marcy, Joe's trustworthy assistant and sole confidante. They all walk a fine line between fighting crimes and committing them, all the while looking out for each other.