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You can watch What Lies Below (2020) for free on Hoopla, rent on Apple TV+, or buy on Apple TV+.

A socially awkward teenager is blindsided when her mother introduces her to her new fiancée. At first, his charm, intelligence, and beauty seem too good to be true, and after a series of strange occurrences, the teenage daughter realizes that this new member of their family is not exactly who he seems.

When her mother's charismatic new fiancé moves in, a lonely teenager finds her suspicion growing alongside a series of unsettling, inexplicable events. This slow-burn thriller trades psychological subtlety for eerie, sci-fi undertones that question the true nature of her new stepdad.

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