The highly skilled agents of the FBI's Behavioural Analysis Unit are back for their most powerful season yet, as Criminal Minds returns with all 26 Season Four episodes! This season, as Hotch (Thomas Gibson) suffers injuries due to a car bombing, Reid (Matthew Gray Gubler) finally confronts his long-lost father. Also, Prentiss (Paget Brewster) revisits her painful past, Morgan (Shemar Moore) tries to stop a cop killer, and Rossi (Joe Mantegna) brushes off a fan - who is later strangled! But after technical analyst Garcia (Kirsten Vangsness) helps catch an arsonist - and "JJ" (A.J. Cook) gives birth to a healthy baby boy, its clear this tight-knit group will always be there for each other - in their hearts and in their minds.