See Also: 'Bloodlines' Episode Guide

CSI: Crime Scene Investigation's fourth-season finale will reportedly revolve around a hard-hitting rape case that stuns all the CSIs, especially Sara Sidle.

Entitled "Bloodlines", the episode deals with the rape of a woman called Linley Parker, according to CSI Files sources. Linley is driving home from work when an SUV hits her car. The man gets out and apologises, but then punches her in the face. He throws Linley over his shoulder and takes her into the undergrowth, where he rapes her. During the horrific ordeal, he keeps on forcing Linley to look at him.

Catherine and Sara visit Linley in hospital, but Sara opts out of the interview to take some of the evidence back to the lab. Catherine takes the statement, then arranges for Linley to meet with Karen Taylor, a forensic artist. The likeness Karen produces is so accurate that Linley throws up on the spot.

Meanwhile, Grissom, who has heard Sara decided to opt out of the interview, advises her to take some time off because the case is clearly getting to her. She responds that she's still working Linley's case and turns the tables by asking Grissom when he last took a vacation. He doesn't need to respond. The answer's clear: never.

Catherine tries to match the forensic sketch of the assailant with a database of driver's licenses. She comes up trumps with Todd Coombs, a psychologist. Linley identifies him in the line-up. There's no doubt in her mind: it's him. But his DNA doesn't match the semen of the rapist. Damn.

There is a ray of hope, though. Todd's DNA shows he's related to the rapist, who is probably a brother. Sara, who puts herself back on the case, examines the Coombs family tree. She discovers that Todd doesn't just have one brother, but four: Roger, Larry, Stuart and Kevin.

The CSIs split up. Sara and Detective Vartan visit Stuart, a home security officer, while Warrick and Detective Brass track down Roger and Larry, who own a used car business (which has plenty of SUVs, incidentally). Kevin doesn't have an address listed.

As if four possible suspects weren't a big enough headache for the CSIs, the case soon takes a tragic turn when Linley is abducted from her car. There is one lead: she had her cell phone on her at the time. Using their GPS system to track Linley's cell phone, the team spread out over the Las Vegas desert in a desperate attempt to find her before it's too late...

Please note that these plot details have not yet been confirmed by CBS, Alliance Atlantis or Bruckheimer Films and until such time you should treat this information as you would any other rumour. The information comes from an early draft of the script and aspects of the episode may change before it goes to air.

"Bloodlines" will likely air in late May, 2004.

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