In this clip, Charlie explains how similiar to fingerprinting, he compares many aspects of a fire to assign each its own statistical signature.

Charlie discusses how he inputs numerous variables to construct a database of fire "fingerprints" to trace the arson back to the perpetrator.

This scene illustrates how statistical models (especially concerning human behavior) can be wrong due to a variety of unforeseen factors.

In this scene, Charlie and Don realize that their mathematical model is wrong because they were focusing on the wrong factor (the home) as opposed to the right one (the criminal's workplace).

In this clip, Charlie explains and illustrates how he can use the fictional 'squish squash' algorithm to isolate the radar signal of the plane he's looking for from the other radar signals.