S04E10: 'Heaven And Hell'

Sam and Dean continue to investigate how Anna developed her gift and why the angels want her dead.

Intrigued by Castiel's proclamation that Anna is hiding a dark secret, the Winchesters call upon old friend Pamela to use her psychic powers to uncover the truth.

Soon, they understand why her existence has sparked a showdown between Heaven and Hell, but are forced to reconsider their position when the angels issue an ultimatum: 'Give us Anna by midnight or we hurl Dean back to damnation.'

Matters are further complicated by the arrival of Alastair and his demons, which spooks Ruby and forces her to confront Sam about his decision to abandon his abilities.

Elsewhere, sparks fly between Dean and Anna when she confides in him that she knows all about his time in Hell, and the boys gain an insight into angel lore from an unlikely source.