Ezekiel tells Dean (Jensen Ackles) a group of angels is hunting Castiel (Misha Collins).  Dean and Sam (Jared Padalecki) race to find their friend before the angels do.  Meanwhile, a homeless Castiel is trying to make his way through the city and comes across some unexpected surprises.  Kevin Hooks directed the episode written by Brad Buckner & Eugenie Ross-Leming (#903).