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Sum of the Unknown was released on October 3, 2018 but we couldn't find it on any streaming service yet. Rights can change — try again later.
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Sum of the Unknown — streaming FAQ
Which OTT platform streams Sum of the Unknown?
Sum of the Unknown isn't streaming anywhere in Australia yet.
Is Sum of the Unknown on Netflix?
No, Sum of the Unknown is not on Netflix in Australia as of September 2026.
Is Sum of the Unknown on Amazon Prime Video?
No, Sum of the Unknown isn't on Amazon Prime Video in Australia right now.
Where can I watch Sum of the Unknown for free?
Sum of the Unknown isn't streaming in Australia yet, so there's no way to watch it free at the moment.
What is the OTT release date for Sum of the Unknown?
Sum of the Unknown hasn't started streaming in Australia yet. Based on the typical 6–8 week theatrical-to-streaming window, we estimate it will arrive around November 21, 2018. This is a prediction, not a confirmed date.
