Why Superman's Human Parents Matter (Video)

Zack Snyder, Kevin Costner and Diane Lane talk about the importance of Ma and Pa Kent to Superman and the Superman mythos in a clip from the "Man of Steel" Blu-ray extra.

It's not just the superpowers or the costume that make Superman who he is -- it's also the moral code and desire to do good that he was given by his human parents, Jonathan and Martha Kent. In this exclusive clip from Strong Characters, Legendary Roles, a documentary from the new Man of Steel Blu-ray, Zack Snyder, Kevin Costner and others talk about the impact the Kents had on the famous superhero.

The documentary is just one of the special features on the Blu-ray release of the summer blockbuster. Fans also will be able to explore Superman's home world in Planet Krypton; watch Henry Cavill, Michael Shannon and Antje Traue train for their roles in All-Out Action; and enjoy Journey of Discovery: Creating 'Man of Steel,' a feature-length, behind-the-scenes look at the making of the movie.

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The Man of Steel home release comes in multiple formats, including Blu-ray Combo Pack, Blu-ray 3D Combo Pack, DVD 2-disc edition, 3D Limited Collector's Edition with Ultraviolet download, as well as digital releases through iTunes, Amazon, Xbox and others. All will be released tomorrow.