Superman and Supergirl take on the cybernetic being known as Brainiac, who boasts that he possesses "the knowledge and strength of 10,000 worlds."
Unfortunately, Superman: Unbound is not available in the the United States on any of the streaming services.
You can buy or rent Superman: Unbound on the following streaming services in the the United States: Vudu, Amazon, iTunes, Microsoft and Google Play.
Superman: Unbound was released 11 years ago in 2013.
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