Fans of the show, which is a spinoff and continuation of the original "Criminal Minds" series, had some strong reactions to the plot move and worried about how it will affect Will's wife JJ Jareau (A.J. Cook). "Criminal Minds I will not forgive you for doing this to JJ," one wrote on X.

Here is everything you need to know about Season 18 of 'Criminal Minds: Evolution' including what the future holds for Will LaMontagne Jr. and Spencer Reid.

Evolution kills its first major character, but while it's like a long time coming, there's still no acceptable reason for the tragedy,