The Beast Within (1982) is a Horror, Fantasy, Science Fiction film that follows a horrified teen mutates into a crazed cannibalistic swamp creature, and must uncover the terrifying secret identity of his father before his nasty natural tendencies force him to make jambalaya out of the locals. Currently, you can watch The Beast Within on fuboTV, MGM+ Amazon Channel, MGM Plus Roku Premium Channel, MGM Plus. Streaming availability may vary by country and platform over time. It has a user rating of 5.5 out of 10 from 123 votes. Fans of horror movies may also want to explore similar titles below.