Based on the hit CBS TV-series. Working as an NCIS team, players visit the crime scene, get statements from suspects and see what the latest news is at headquarters. During each game, plot twists occur that may -- or may not -- change your suspicions. As a group, decide who to arrest. If you're in a deadlock, the player who's Agent Gibbs, will decide!
This game has 6 potential suspects in each case, with a little background. There are 8 things you can investigate each round (the suspects, plus the crime scene, and research in headquarters). There are clues that you don't have the time or resources to hear, so you have to decide where to focus to get the information you need. That doesn't always mean just the person you think is the suspect, sometimes another person gives you a clue about your main suspect.
If you put an investigator on an area, there is a number to look up and read in the book to tell you what information has been found. After four rounds, you'll make an arrest, and then read the solutions book to find out if you were right.
All characters are used no matter the play count, so it works the same no matter the number of players.