Bleach Bleach Season 1, episode 307 Emergency Situation! Aizen, New Evolution! 8.2 / 10 February 1, 2011 24 min As the Humans run away, Gin Ichimaru betrays Sōsuke Aizen. Previous episode For the Sake of Protecting! Ichigo vs. Tensa Zangetsu! Next episode Goodbye…Rangiku