Season 5, Episode 21 Disturbed

First Aired: May 1, 2009

Charlie focuses his attention on tracking a previously undetected serial killer to help deal with his guilt over Don's almost-fatal stabbing. He receives help from a geeky amateur sleuth and a retired accountant, who each research serial murders as hobbies. The investigation reveals that the killer may be responsible for over two dozen unsolved deaths.

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  • Premiered: January 23, 2005
  • Rating: TV-14
  • Premise: An FBI special agent in Los Angeles teams with his mathematical genius brother to solve crimes. Don, a veteran investigator, relies on hard facts and evidence to catch crooks, while his younger brother Charlie, a brilliant university professor, analyzes ma… (more)

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