

A Victorian gentleman hopes to find his long-lost son, who vanished while searching for a mysterious Viking community in a volcanic valley somewhere in uncharted Arctic regions. The gentleman puts together an expedition team to go on the search, but when they reach their destination they must escape from some Viking descendants who will kill to keep their existence a secret.
Practical Effects
Mighty airship Hyperion—practical effects before CGI ruined everything
Production
Arctic sets built in Burbank, somehow more convincing than green screen
Costume
Viking chic meets Victorian explorer cosplay, absolutely unhinged

Director
Robert Stevenson
Trivia, insights & behind the scenes
Mako's character Oomiak was originally written with dialogue, but the actor suggested silence—stealing every scene with just eyebrows and physical comedy.
This was Disney's desperate 1974 attempt to recapture Mary Poppins magic; it flopped so hard they buried it until streaming resurrected it for chaos historians.
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Reactions from the web
Yes, after a long long search, this is the movie you saw as a kid on the tv and never found back until now.
@axzor5372 31
VERY UNDERATED Disney film.
@RedWelshDragon 41
I saw this movie in 1975 when I was 9 years old...I have thought about it often. I am so glad to see this here...thank you!!!
@tubelover12 24
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