Terror of Mechagodzilla (1975) runs 1 h 23 min, is rated G in the US and averages 6.8 from 257 TMDB members. A submarine expedition to salvage the remains of Mechagodzilla is thwarted by a massive dinosaur named Titanosaurus. An Interpol investigation leads biologist Ichinose to uncover the work of Dr. Mafune and his mysterious daughter Katsura. Aligned with the Black Hole Aliens, Katsura's life becomes entwined with the resurrected machine.
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Streaming availability by JustWatch. In the US, as of 2026-11-06: HBO Max Amazon Channel (subscription), Criterion Channel (subscription), FlixFling (subscription), HBO Max (subscription), The Roku Channel (free with ads), Shout! Factory TV (free with ads), YouTube Free (free with ads), Tubi TV (free with ads).
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