Jacob Two-Two

Jacob Two-Two and the Boggie Beastie (4x1)

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Zaidie Saul sees a legendary sea serpent known as "Boggy," but everyone assumes it's just another one of his tall tales. Jacob sets out to prove his Zaidie is telling the truth, and triggers a sea serpent mania that could endanger the shy and peaceful beast—if she really exists, that is.