Remember Agent Vince Masuka from "Dexter?" Well, he will be joining "Criminal Minds" Season 10, but only as a guest star. C.S. Lee, who plays Agent Masuka, is a well-loved character and it will surely be a treat to see him play a whole different role in "Criminal Minds."

TVLine reports that C.S. Lee will be playing a high school English teacher. However, he will have an obsession - a deadly one. His backstory involves being traumatized because of his overbearing father. His father used to lock him up with his brother in a shed just because of their poor grades. TVLine wrote: "can't imagine that has manifested itself too badly in adulthood."

The kind of obsession that the character has wasn't disclosed and we will all have to wait when "Criminal Minds" season 10 airs.

There's another spoiler for season 10. The first three episodes of the 10^th season will be Reid-centric as the shooting in the last season finale has affected Reid and Garcia more than they expected.

However, both of them are not really saying what they truly feel. By episode 4, the true feelings of Reid will start to surface. Showrunner Erica Messer told TVLine: "It was a traumatic event. It was certainly something Garcia's never done and certainly isn't used to."

Meanwhile, Jennifer Love Hewitt joins the cast for season 10 and is taking on a new role. She will be part of the BAU unit. Messer described Hewitt's character, Agent Callahan, as someone who "would go to great lengths to get her job done." Agent Callhan would even go as far as making out with a criminal, if it would help her with a mission.

"Criminal Minds" Season 10 will be back on CBS on October 1.