Criminal Minds: "Penelope" - The team unites to determine if Garcia's life is being threatened by a serial killer, on CRIMINAL MINDS, Wednesday, Nov. 21 (9:00-10:00 PM, ET/PT)starring Joe Mantegna, Thomas Gibson, Paget Brewster, Shemar Moore, Matthew Gray Gubler, A.J. Cook and Kirsten Vangsness. Writter: Chris Mundy. Producer: Felix Enriquez Alcalá. Nicholas Brendon ("Buffy the Vampire Slayer") Guest Stars. Episode info courtesy of cbs.com