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Abruptly departed: Kim Delaney
Copyright © 2009, The Los Angeles Times
Played: Det. Megan Donner
Lasted: 10 episodes (2002)
Why she left: Reported clashes with star David Caruso, rumored drinking problems and overall tense working conditions led the former "NYPD Blue" actress to quickly burn out. She checked into an Arizona clinic soon afterward for "relapse prevention" and returned to "NYPD Blue."
How it went down on air: After returning to work at the CSI lab following her husband's death, Donner found the pressures of the job too great and went on leave again.