Criminal Minds' Joe Mantegna, FBI's Missy Peregrym, and CSI: Miami's David Caruso

Photo credits: Darren Michaels/CBS via Getty Images; Michael Parmelee/2021 CBS Broadcasting Inc.; Ron P. Jaffe/CBS Photo Archive via Getty Images

By Nate Millado

Pop quiz: What's the difference between CSI and NCIS? True fans of CBS' hit procedurals would know! Here's your chance to test your acronym IQ.

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