Castiel later sends Dean back through time in episode 4.03, In the Beginning, to when Azazel had made a pact with Mary Winchester to show Dean all that they know of the demon's plan. However, he admits that they are unaware of the main goal that he had for his psychic children. When Castiel returns Dean to the present, he tells him that they are unsure of Sam's part in Azazel's plan and that Sam is headed down a dangerous road. Pointing out that Sam, who had left in the night to go with Ruby, is not in the hotel room, Castiel tells Dean of his brother's location and gives an ultimatum: either stop Sam, or the angels will.