Movie·2023·90 min
Underground Monster
Underground Monster streams in the US free with ads on The Roku Channel and Tubi TV, as of October 6, 2026.
5.6 / 10 · TMDB
Near a remote town, the repeated dumping of toxic waste causes an underground cave dweller to mutate into a hideous monster. A construction team that is digging a tunnel accidentally disturb the creature's habitat causing it to attack.
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