<P> Upon rejoining the regular cast in the series' eleventh season, Fox once again appeared in most episodes, including the series finale . </P> <P> Sidle was born on September 16, 1971, in Tomales Bay, an hour and a half north of San Francisco . Her father was an abusive alcoholic and was killed by Sidle's schizophrenic mother in 1984 . Afterward, she spent time in the foster care system, which didn't keep her from graduating high school as valedictorian at age 16 . She attended Harvard on a scholarship, moving on to graduate school at the University of California, Berkeley . While at Berkeley, she started a work - study position at the San Francisco Coroner's Office, where she would also audit lectures to keep up with new developments; it was at one of these that she met Gil Grissom . </P> <P> Some time later, while she was working in San Francisco, Grissom called her because he needed someone outside the Las Vegas team . Sidle went to Las Vegas and helped resolve some Internal Affairs problems within the CSIs while also providing a replacement for Holly Gribbs, who had been shot . Some episodes later, she became a permanent member of the night shift as a CSI Level 3 at the LVPD Criminalistics Bureau, specialising in materials and element analysis . In Season 8, Sidle briefly changed from nights to swing shifts . In the Season 10 premiere, it is revealed she is married to Grissom . In Season 13, Episode 15, she reveals that Grissom had split up with her . However in series finale "Immortality", she and Grissom are reunited . </P> <P> Perhaps because of her traumatic childhood, Sidle has demonstrated compassion and empathy for victims of domestic violence, and fury against their abusers . She also has a soft spot for animals, and became a vegetarian after she saw Grissom conduct an experiment on a dead pig . She has also shown a tendency to become very aggressive when under pressure or annoyed, especially in cases involving abused women - such as her arguments with Catherine and Ecklie, and engaging in a heated argument with a man suspected of murdering his wife . In recent years, perhaps because of her mother's schizophrenia, she has been seen to work several cases with a mental health aspect . </P>

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