"Daughter of the Demon"
*The story that introduced Ra's al Ghul is reprinted in the first of DC's new line of facsimile edition comics. In "Daughter of the Demon," Ra's reveals that he knows Batman's secret identity-and that he needs the Caped Crusader's help to save his daughter, Talia. It's a tale that established Ra's al Ghul as one of Batman's most cunning and unpredictable foes! *Source: dccomics.com
Batman's secret identity has now become knowledge to Ra's al Ghul. It becomes a bargaining chip along with the life of Robin, to get Batman to rescue something very precious to him. (Note: Deadman, Mr & Mrs Wayne and Mrs & Mrs Grayson appear in separate one-panel cameos)
First appearance of Ra's al Ghul.