Fans will miss Agent Kate Callahan in "Criminal Minds" season 11 as Jennifer Love Hewitt has given up fictional police work to become a full-time mom to her kids. 

But Kate isn't the only character long-time viewers wish would return at some point. There are also hopes of the possible comeback of forensic expert Einstein (Candace Hammer) who Dr. Spencer Reid (Matthew Gray Gubler) met a few months back. Unfortunately, there are no plans to have her in season 11, TV Line confirms. 

More about Reid, showrunner Erica Messer said that Gubler's character will start off the season with tension and drama that's both thrilling and disconcerting. Messer explained that Reid will take part in a task that's disturbing, to say the least. 

"He gets to do a takedown Reid style, which is just using his brain with a physical thing that's really disturbing — you have to turn away," Messer told Entertainment Weekly. "It's not a standoff with a gun, it's a Reid version of a takedown."  

Reid will enjoy the spotlight in season 11. He will reportedly be a major player in the upcoming season and this starts right in the premiere titled "The Job." 

Messer also said in another Entertainment Weekly interview that the new season will tackle "a sort of Silk Road/hitman-for-hire storyline."

In elaborating this, she said, "We're picking up those pieces of what happens when you kill the head of a monster? Another one grows." 

"Criminal Minds" season 11 is scheduled to premiere on Sept. 30.