Criminal Minds Yahoo Group Chat Reminder: The chat will be Wednesday directly following the new episode. Lets get together and discuss our favorite people: Jason Gideon (Mandy Patinkin), Aaron Hothner (Thomas Gibson), Dr. Spencer Reid (Matthew Gray Gubler), Derek Morgan (Shemar Moore), J.J. (A.J. Cook), Penelope Garcia (Kirsten Vangsness) and Emily Prentiss (Paget Brewster).