Criminal Minds Exclusive Sneak Peek: Reid Makes a Prison Buddy

Reid (Matthew Gray Gubler) begins his jail stint on Wednesday's Criminal Minds as he awaits trial in his murder case.

In our exclusive sneak peek, Reid meets Calvin Shaw (Harold Perrineau), a former FBI agent incarcerated for killing one of his informants in 2005.

Criminal Minds airs Wednesdays at 9/8c on CBS.