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| Dead Ringer | |
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| Season | 4 |
| Number | 20 |
| Writer | Elizabeth Devine |
| Director | Kenneth Fink |
| Original Airdate | April 29, 2004 |
| Navigation | |
| Previous Episode: Bad Words | |
| Next Episode: Turn Of The Screws | |
Dead Ringer is the twentieth episode of season 4 of CSI: Crime Scene Investigation
Plot
The CSIs have to drop out off the annual 120-mile 24-hour Marathon Baker to Vegas relay race when Grissom finds a dead contestant next to the track. Meanwhile Warrick and Sara investigate what appears to be a murder-suicide when a male and a female cop are found dead in a hotel room.