This is a Long Form format that can be played with a large number of players. It is inspired by the Cluedo board game.

The basic idea is a gathering of many characters. Audience may provide the reason for the gathering, and audience suggestions may be used to give each player a character. One character is destined to be killed; the other characters should have reasons to kill the victim; again audience suggestions may be used for that, or you let the motives evolve as the performance develops. One player is set aside to play the detective; alternatively a second player may become the detective's sidekick. Alternatively, the script for the gathering and a description of the characters are prepared before the show.

The format starts with the gathering, at one point lights go out and when they come up again, the victim is dead.

Next, the detective(s) interview each of the characters (separately, though other characters may interfere during the questioning). Each character should make themselves suspect, at the same time of course denying every involvement in the murder. The characters may try and implicate other characters. Events discovered during the interviews may be played as flashbacks.

After every character has been interviewed, the detective calls all characters together, Hercule Poirot style, and discusses the motives for each character. The last character discussed is tagged as the killer.

Then lights go out, and the opening scene is re-played, lights go out, come up again, and we finally see the murder happening, by the designated killer, in slow motion.