'Criminal Minds' Season 10 has commenced filming. and photos are already flooding the Internet.

A Twitter post under the show's account is for fans to have a taste of the upcoming season. It shows a hacked off leg with stitches which look real, saying, "it looks like they are back."

Another teaser photo on Twitter shows two editors watching a supposed episode with the caption that they are getting settled at the filming set of Criminal Minds Episode 10, day 3 of 8.

A.J. Cook, who portrays Jennifer Jareau hinted that Season 10 is significantly connected with the ending of the previous season. The upcoming season will feature Kerr Smith as a killer, as well as Jennifer Love Hewitt as an undercover agent of the FBI.

Reports said "Dawson's Creek" star Smith will portray Frank Cowles, a killer with an unusual fetish. He will be a creepy guy who collects and enjoys human limbs, a.k.a. an acrotomophile. Hewitt's character will be FBI agent Kate Callahan.

Erica Messer, the Criminal Minds showrunner, is excited to work with Hewitt, who is an additional talented actress on the show's amazing cast. She said exhilarating storylines await Callahan in Season 10.

Meanwhile, Cook told RTE in a July 15 interview that being part of Criminal Minds makes her learn a lot of things, becoming generally more wary and paranoid about people. Cook admits she already looks at people in a different way sometimes.

As for the fans who helped a lot to bring her back to the show during Season 6, when she was about to be dropped, Cook is very grateful.

The Criminal Minds Season 10 premiere will take place on CBS this October 1.