"Criminal Minds Season" 12 will feature Adam Rodriguez replacement of Derek Morgan. The upcoming series will also see the return of an Interpol agent.

"Criminal Minds" new actor Rodriguez is suggested to replace Morgan's character upon his exit. Rodriguez will be playing an FBI Fugitive Task Force Agent who will help the Behavioral Analysis Unit. The "Criminal Minds" Season 12 will also recast Paget Brewster for multiple episodes only as revealed by Kirsten Vangsness who plays tech genius Penelope Garcia on the series.

CBS was also trying to cast Brewster for "Criminal Minds" Season 11, but the actress was busy shooting for Fox's "Grandfathered." Brewster's stint in "Grandfathered" just wrapped up, which gave possibility to her return to "Criminal Minds" and play as the Interpol agent Emily Prentiss, Yibada reported.

Prentiss is a BAU supervisory special agent who first appeared in "Criminal Minds" Season 2 as one of the main cast. However, after the "Criminal Minds" Season 7, Prentiss only appeared as a guest character in a few succeeding episodes.

Brewster expressed her excitement when she announced her return in "Criminal Minds" through her Twitter account. It is not revealed yet whether Brewster will appear on the first episode or on a later episode of "Criminal Minds" Season 12, Christian Daily reported.

Meanwhile, "Criminal Minds" Season 11 finale ended with Aaron Hotch being arrested with 13 serial killers escaping prison. One of the escaped prisoners is suggested to be Mr. Scratch. The upcoming "Criminal Minds" Season 12 plot will pick-up on the escaped notorious criminals scene. They will run the criminals including the mind-controlling serial killer Mr. Scratch.

"Criminal Minds" has seen the exit of a number of original characters such as Mandy Patinkin, Jeanne Tripplehorn, Jennifer Love Hewitt and Jayne Atkinson. Most recently in the "Criminal Minds" Season 11, Shemar Moore also exited. However, Moore is suggested to come back for occasional "Criminal Minds" Season 12 guest appearances.

"Criminal Minds" Season 12 will return on Sept. 28 at 9 p.m EST on CBS.