Criminal Minds - Season 7 Episode 22 -

As a favor owed, Rossi presents a lecture to a university undergraduate class, the lecture at which the entire team participates to support their respected colleague. Their presentation, which provides the basics of profiling, uses one of their cases as its centerpiece. The case, which so far spans twenty years since 1992, is of perhaps the most prolific serial killer they have ever tracked, he who killed up and down the west coast of the United States. The presentation makes the team not only reminisce about the case itself, but how the current team members first met...