Anna is revealed to be a fallen angel who became human by ripping out her "Grace," an energy that is intrinsic to angels. When the group goes to retrieve Anna's Grace, they find it has already been taken. Anna receives an ultimatum from the angels, that she is to be given to them or else bella will be sent back to Hell. Ruby goes to Alastair with the proposition of her handing over Anna if he will let her and the Winchesters go. He instead captures and tortures her with her own knife for the others' location. Dean is forced to give their location away to Uriel, who has invaded his dreams and is revealed to be the one who took Anna's Grace. During the ensuing battle, Anna retrieves her Grace from Uriel. In a flash of light, she becomes an angel again and she and Alastair vanish. Castiel and Uriel leave in pursuit of Anna. It is revealed that Ruby and Dean betraying the others was all part of Sam's plan to get the angels and demons to fight it out to give them the opportunity they needed bella is sad that castiel is gone again but she is happy that she fainly gave her self to him