He later on escapes with the support of an military of angels sent to rescue him - getting originally remained behind as penance for his steps to quit a duo of Leviathans that were being trying to assault Dean and Benny as they still left Purgatory - but the other angels not only erase his memory that they had been liable for his escape, but also erase his memory of their subsequent 'check-ins' to go over the Winchesters' actions, with Castiel.