Unknown World poster
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Unknown World

4.419511h 14mNRMovieAdventureScience Fiction

With the cyclotram, an atomic-powered rock-boring vehicle, Dr. Jerimiah Morley leads an expedition into a subterranean world.

DirectorTerry O. Morse
WriterMillard Kaufman
ProducersIrving Block·Jack Rabin

Where to watch

Amazon Prime VideoAmazon Prime VideoCultpixCultpixAmazon Prime Video with AdsAmazon Prime Video with AdsArtiflixArtiflixTubi TVTubi TV
Availability shown for Australia · rights vary by country

Cast · Directed by Terry O. Morse

BKBruce Kellogg
Bruce Kellogg
Wright Thompson, Jr.
OWOtto Waldis
Otto Waldis
Dr. Max A. Bauer
JBJim Bannon
Jim Bannon
Andrew "Andy" Ostergaard
TH
Tom Handley
Dr. James Paxton
DCDick Cogan
Dick Cogan
Dr. George Coleman
GBGeorge Baxter
George Baxter
Carlisle Foundation Chairman
MNMarilyn Nash
Marilyn Nash
Dr. Joan Lindsey
VKVictor Kilian
Victor Kilian
Dr. Jeremiah Morley (uncredited)

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More from Otto Waldis · Co-star actor

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More from Terry O. Morse · Director

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Unknown World — streaming FAQ

Which OTT platform streams Unknown World?

Unknown World is streaming on Amazon Prime Video, Cultpix and Artiflix in Australia, and available to rent or buy on Amazon Video. It's not currently on Netflix.

Is Unknown World on Netflix?

No, Unknown World is not on Netflix in Australia as of November 2026. It's currently on Amazon Prime Video and Cultpix.

Is Unknown World on Amazon Prime Video?

Yes — Unknown World is included with an Amazon Prime Video subscription in Australia as of November 2026.

Where can I watch Unknown World for free?

Unknown World is available to stream free (with ads) on Artiflix and Tubi TV in Australia.