Viewers are lead to believe that Ra's Al Ghul died when the train de-railed and crashed into Wayne Tower in Batman Begins.
But he appears to Bruce while he is in the pit during the Dark Knight Rises.
Ra's Al Ghul: "Did you not think I would return Bruce?"
Bruce Wayne: "Ra's?"
Ra's Al Ghul: "I told you I was immortal."
Bruce Wayne: "I watched, I watched you die."
Ra's Al Ghul: "Oh there are many forms of immortality."
Is it just Bruce dreaming or is Ra's truly immortal and did appear to Bruce in the pit?