Changes are coming to the CBS crime drama "Criminal Minds," with a former cast member in talks to return as a series regular and an executive producer leaving, reports TVLine.com.

A.J. Cook, who left the program at the end of last season when her option wasn’t picked up–drawing an outcry from the show’s fans–is in discussions to come back full time, the story says.

Meanwhile, executive producer Ed Bernero told the cast and crew on Tuesday that he’s leaving the show, something that had been speculated about since his script "Partners" was picked up to pilot at ABC earlier this year. Executive producer Erica Messer will take over as sole showrunner, according to the report.