UPS
Why Rachel Nichols Left Criminal Minds After Season 6
Rachel Nichols had a surprisingly brief stint as FBI agent Ashley Seaver on Criminal Minds, and here's why she left after season 6. Over the course of its 15 seasons, CBS' Criminal Minds experienced a good number of casting changes. From actors Shemar Moore to Jennifer Love Hewitt, several memorable actors passed through the doors of the FBI's Behavioral Analysis Unit. The series itself chronicled the BAU's many cases as its dedicated team investigated the worst kinds of criminals the world had to offer.