Now that Joker knows Bruce Wayne is Batman, Joker controls Gotham, and Batgirl is paralyzed Bruce decides to go back to the League of Assassins which are a group of highly trained killers that trained Batman when he first started. For a good chunk of the season Bruce trains under Ras Al Ghul and Slade Wilson until he learns of Ras's cult rituals and sacrifices and goes back to Gotham to stop the Joker. Once back in Gotham he learns that Joker has taken Jason Todd hostage and so Batman teams up with Dick Grayson who has returned to Gotham as Nightwing to save Jason. The season ends with Slade Wilson coming to Gotham to kill Batman while they try to save Jason but they're too late and Joker kills Jason and Slade fails to kill Batman. The season closes with Batman and Nightwing taking back Gotham and Joker escaping once again.
