| Unit Description | Show |
| The 'sex' crimes unit of the NYPD. | |
| The Major Case Squad of the NYPD | |
| NYPD Detectives | |
| The 15th Precinct of Manhattan of the NYPD | |
| The NYPD Polcie Comissioner and his family of police officers. | |
| The US Marshals of The Federal Witness Protection Program (WITSEC) | |
| The Naval Criminal Investigative Service | |
| The Lightman Group | |
| The Federal Bureau of Investigation's'Fringe Divison' under the supervision of Homeland Security | |
| The California Bureau of Investigation's Homicide Dvision | |
| Jeffersonian Institute Forensic Sciences Department in conjunction with The Federal Bureau of Investigations | |
| LAPD Officers | |