4x10 Heaven and Hell

Anna is able to banish Castiel and Uriel with a blood sigil without knowing how. Wanting answers, Dean and Sam call upon psychic Pamela Barnes, who uses hypnosis on Anna. Doing so restores her memories of what she truly is: a [Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτόν το σύνδεσμο.]. She was unsatisfied with the unemotional and never-changing life of heaven so she became human, ripping out her Grace and being born naturally in a human body. Sam manages to track down her Grace, which would restore her powers and angel status, but find it missing. Dean and Anna develop a romantic attachment and end up having sex in the Impala. Ruby betrays the boys to Alastair who tortures her and Dean betrays them to Uriel (who has Anna's Grace) under threat to Sam. The demons and angels arrive and battle each other. During the confusion, the demon minions are killed and Anna retrieves her Grace from Uriel. In a flash of light, Anna becomes an angel again and Alastair is apparently destroyed. While Sam believes Anna will be happier now, Dean knows this not to be true. It is revealed that Ruby and Dean betraying the others were all part of a plan to get the angels and demons to fight it out to give them the opportunity they needed. Dean also reveals to Sam that he does, in fact, remember Hell and what happened there: it was 40 years for him instead of 4 months, and every day, Alastair (Hell's torturer), tortured him and then offered him release from the torture if he tortured souls himself. After 30 years, Dean gave in and is now haunted by how he did so.