Joe Mantegna Missy Peregrym David Caruso

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

How well do you know these acronyms from your favorite hit CBS shows?

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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William Petersen

William Petersen returns as Grissom this fall on CSI:Vegas.

Photo: Sonja Flemming/CBS via Getty Images.

Stands for:Crime Scene Investigation

Gil Grissom (William Petersen) led a team of crime-scene investigators, hired by the Las Vegas Police Department, that used physical evidence to crack cases and solve murders. The high-tech hit series ran for 15 seasons and spawned several spinoffs: CSI: Miami, CSI: New York, CSI: Cyber, and this fall's CSI: Vegas, which reunites OG stars Grissom and Sara Sidle (Jorja Fox).

Stream episodes of CSI: Crime Scene Investigation and CSI: Miami on Paramount+. CSI: Vegas premieres this fall on CBS.


LL COOL J and Chris ODonnell

NCIS: Los Angeles Special Agents Sam Hanna (LL COOL J) and G. Callen (Chris O'Donnell)

Photo: Ron P. Jaffe/CBS © 2021 CBS Broadcasting Inc.

Stands for:Naval Criminal Investigative Service

The NCIS is the federal law enforcement agency of the U.S. Department of the Navy, investigating felonies, preventing terrorism, and protecting secrets for the Navy and Marine Corps.

NCIS airs Tuesdays at 8/7c on CBS. NCIS: Los Angeles airs Sundays at 9/8c on CBS. NCIS: New Orleans airs Sundays at 10/9c on CBS. Stream episodes on Paramount+.

NCIS: Hawaii premieres this fall on CBS.


Zeeko Zaki and Missy Peregrym

Zeeko Zaki as Special Agent Omar Adom Zidan and Missy Peregrym as Special Agent Maggie Bell in FBI

Photo: Michael Parmelee/2021 CBS Broadcasting Inc.

Stands for: Federal Bureau of Investigation

FBI is a fast-paced drama about the inner workings of the New York office of the Federal Bureau of Investigation. This elite unit brings to bear all their talents, intellect and technical expertise on major cases in order to keep New York and the country safe. Its spinoff, FBI: Most Wanted, follows the Fugitive Task Force, which relentlessly tracks and captures notorious criminals on the Bureau's Most Wanted list.

FBIairs Tuesdays at 9/8c, followed by FBI: Most Wanted at 10/9c, on CBS.


\u200bThe cast of Criminal Minds

The cast of Criminal Minds

Photo: Cliff Lipson/CBS via Getty Images

Stands for: Behavioral Analysis Unit

The BAU is a department of the FBI that uses behavioral analysis to assist in time-sensitive criminal investigations using case experience, research, and training. CBS' hit series of criminal profilers, Criminal Minds,ran for 15 seasons—and is being revived as a 10-episode limited series for Paramount+!

Stream every episode of Criminal Minds on Paramount+


SWAT team

Shemar Moore as Daniel "Hondo" Harrelson and David Lim as Victor Tan in S.W.A.T.

Photo: Bill Inoshita/CBS © 2021 CBS Broadcasting Inc.

Stands for: Special Weapons and Tactics

S.W.A.T. stars Shemar Moore as a former Marine and locally born and raised S.W.A.T. sergeant tasked to run a specialized tactical unit that's the last stop in law enforcement in Los Angeles. S.W.A.T. teams use specialized or military equipment and tactics.

S.W.A.T.airs Sundays at 10 p.m. ET/PT on CBS. Stream anytime on Paramount+.


\u200bDonnie Wahlberg as Danny Reagan.

Donnie Wahlberg as Danny Reagan in Blue Bloods

Photo: John Paul Filo/CBS © 2021 CBS Broadcasting Inc.

Stands for: New York City Police Department

Blue Bloods centers on a multi-generational family of cops dedicated to New York City law enforcement. Frank Reagan (Tom Selleck) is the police commissioner, and heads both the police force and the Reagan brood. Eldest son Danny (Donnie Wahlberg) is a seasoned detective; daughter Erin (Bridget Moynahan) is a New York assistant district attorney; and youngest son Jamie (Will Estes) is a beat cop–turned–police sergeant.

Blue Bloods airs Fridays at 10/9c on CBS.


David Boreanaz as Jason Hayes

David Boreanaz as Jason Hayes in SEAL Team

Photo: Sonja Flemming/CBS © 2021 CBS Broadcasting Inc.

Stands for: Sea, Air, Land

SEALs are an elite, expertly trained unit of the Navy that plans and executes the most dangerous, high-stakes, highly specialized missions our country can ask of them, including direct action warfare, special recon, and counterterrorism.

SEAL Team airs Wednesdays at 9/8c on CBS.


Jay Hernandez as Thomas Magnum

Jay Hernandez as Thomas Magnum in Magnum P.I.

Photo: Karen Neal/CBS 2021 CBS Broadcasting Inc.

Stands for:Private Investigator

Thomas Magnum (Jay Hernandez) is a decorated former Navy SEAL who, upon returning home from Afghanistan, repurposes his military skills to become a private investigator.

Magnum P.I. airs Fridays at 10/9c on CBS.

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