Kit Harington reviles as a monster inside and out in a poorly executed allegory of domestic abuse. The Beast Within follows a sickly young girl who wonders where her tempestuous father goes during the full moon. Her search for the truth is plain as day to a bored audience waiting for the characters to reveal the obvious. The rub is that the film’s werewolf elements mask a cowering family ruled by a tyrant. The title’s double entendre has poetic intent but doesn’t fill the common sense void in a flawed narrative.