Supernatural 10×13 “Halt & Catch Fire” – A ghost starts killing people through various electronic devices. Sam (Jared Padalecki) and Dean (Jensen Ackles) discover who was killed and why this ghost is seeking revenge on a group of college students but what they can’t figure out is how he’s doing it. With three dead, the brothers must stop the ghost before he claims his next victim. John Showalter directed this episode written by Eric Charmelo & Nicole Snyder (#1013). Original airdate 2/10/2015.