The second episode of Torchwood: Miracle Day, written by Doris Egan of House fame. On the plane, Jack explains that Miracle Day could very well be a morphic field event, which CIA operative Lyn Peterfield relays to Brian Friedkin. It seems that she's working directly for Friedkin, and she poisons Jack with arsenic. Rex subdues Lyn while Gwen gets on the phone with Dr. Juarez and, with great effort, they manage to create an arsenic antidote using ordinary plane supplies.