Agent Caitlin Todd was a member of Gibbs' Major Case Response Team.
Kate was born and raised in Indianapolis. She had three older brothers and one sister. While the boys always tried to protect her, which Kate found rather annoying and unnecessary, she and Rachel were just two very different people. They never got along too well.
After two years in law school, Kate reconsidered her career choice, eventually joining the Secret Service. In the early 2000s, she was assigned to the Presidential Protection Detail on Air Force One. In September 2003, she left the agency voluntarily, because she'd had an affair with a co-worker who was murdered. During the following one and a half years, Kate worked for the NCIS alongside Tony DiNozzo and Timothy McGee.
On May 25th 2005, Kate was killed by Ari Haswari, the half-brother of her successor Ziva David.