Bill and Jo Harding advanced storm chasers on the brink of divorce must join together to create an advanced weather alert system by putting themselves in the cross-hairs of extremely violent tornadoes in the Twister Blu-ray. During the approach of the most powerful storm in decades university professor Dr. Jo Harding (Helen Hunt) and an underfunded team of students prepare the prototype for Dorothy a ground-breaking tornado data-gathering device conceived by her estranged husband Bill (Bill Paxton). When Harding tells Bill that Dorothy is ready for testing - and that their privately funded rival Dr. Jonas Miller (Cary Elwes) has stolen the idea and built his own - Bill rejoins the team for one last mission! Video Codec: VC-1 Resolution: 1080p Aspect ratio: 2.41:1 Original aspect ratio: 2.39:1 Audio English: Dolby TrueHD 5.1 English: Dolby Digital 5.1 French: Dolby Digital 5.