‘The Spirit Lock’ Review Finds a Fresh Idea Inside a Familiar Possession Film

The Spirit Lock introduces a Pagan object into a familiar possession story, but according to iHorror critic Luna Gray, the film does not fully explore the ideas that make its supernatural premise distinctive. Directed by Steven Fierberg and written by Justin Stanley and Mark Jonathan Stanley, the film follows Karl and Vanessa Mellor, whose son has begun behaving violently. Vanessa looks for a medical explanation, while Karl becomes convinced that something supernatural has entered the boy. His search leads him to the Spirit Lock, an ancient object said to contain or expel an entity. Gray identifies the object as the movie’s strongest concept. By replacing more traditional exorcism imagery with a Pagan artifact, The Spirit Lock establishes its own potential mythology. However, the review argues that the film offers limited information about the object’s origins, previous users, or what happens to anything placed inside it. The review also highlights the reversal in the parents’ roles. Karl becomes the believer, while Vanessa remains focused on diagnosis and treatment. Gray writes that this arrangement creates uncertainty during the first act and gives the family conflict a central role in the story. Joe Anderson and Yasmin Al-Khudhairi are credited with sustaining that human drama, with Anderson portraying Karl as exhausted rather than overtly fanatical and Al-Khudhairi bringing dimension to Vanessa’s skepticism. Stefanos Paraskevopoulos plays Kit, while Tim Downie appears as Father Bailey. Much of the film takes place in the family’s rural home, which Gray says effectively reinforces the characters’ isolation. The review finds the movie strongest when it allows the house and the situation to remain uncertain, and less effective when it returns to familiar possessed-child imagery. At approximately 85 minutes, The Spirit Lock is described as unevenly paced. Gray notes that some scenes end before fully developing their ideas, while others continue after their tension has diminished. The review ultimately gives the film three out of five stars, calling it a flawed but worthwhile British possession movie whose Pagan premise is more compelling than its execution. The Spirit Lock is available on UK digital through Seven Tales beginning September 7.