Batman #691 2009

Batman #691, published by DC in 2009, concludes Dick Grayson's initial arc as the new Dark Knight. Two-Face infiltrates the Batcave, questioning Batman's identity after noticing differences from Bruce Wayne. Dick, drugged and beaten, ultimately defeats Two-Face with Alfred's help. The issue is notable as Dick and Alfred begin dismantling the Batcave, and Dick discovers a hidden data key containing secret files about his parents' murder, setting up a significant future mystery.