September 29, 2026 Image Director Mike Nelson on the set of Beware Boiúna. Photo Credit: Ana María Gallón/Lionsgate Mike Nelson's ’05 next feature film, Beware Boiúna, will be released in theaters on October 2, 2026. Nelson and his crew filmed the movie in Colombia, mostly in the Amazon rainforest and river. The film follows a team of doctors on a mission in the Amazon, but their sudden appearance draws the attention of a truck-sized, mythological snake known as the Boiúna. Learn More Beware Boiúna Article (polygon.com)Beware Boiúna(lionsgatepublicity.com) Explore more about Michael Nelson