The Dark Knight DVDDiscs: 1Audio: English, ItalianAspect Ratio: 2.40:1Run Time: 145mins approxSubtitles: English, Arabic, Greek, Hebrew, Icelandic, Italian The Dark Knight Blu-rayDiscs: 2Audio: Dolby TrueHD: English 5.1, Dolby Digital: English 5.1 Dolby, Brazilian Portuguese 5.1, Castilian Spanish 5.1, French 5.1, German 5.1, Italian 5.1, English 2.0 Audio Descriptive Service. Aspect Ratio: 2.4:1Run Time: 153mins approxSubtitles: English, Brazilian Portuguese, Castilian Spanish, Complex Chinese, Danish, Dutch, Finnish, French, German, Italian, Korean, Norwegian, Portuguese, Spanish and SwedishExtra Content- Gotham Uncovered: Creation of a Scene- Batman Tech- Batman Unmasked: The Psychology of The Dark Knight- Gotham Tonight- The Galleries