I, Monster
I, Monster Review: Story, Cast, Rating & Final Verdict
Last updated: April 14, 2026
Movie Overview: I, Monster
| Movie | I, Monster |
| Release Year | 1971 |
| Director | Stephen Weeks |
| Genre | Horror / Science Fiction |
| Runtime | 70 minutes |
| Language | EN |
Quick Verdict: Hit or Flop?
Is I, Monster (1971) worth watching? According to our cinematic analysis, the film stands as a AVERAGE with a verified audience rating of 5.4/10. Whether you're looking for the box office collection, ending explained, or parents guide, our review covers everything you need to know about this Horror.
Cast & Character Study
The performances in I, Monster are led by Christopher Lee . The supporting cast, including Peter Cushing and Mike Raven , provides the necessary layers to the central narrative.
movieMx Verdict: Is it Worth Your Time?
What Works in the Movie
While I, Monster does not fully realize its potential, it still contains moments that may appeal to viewers who enjoy Horror films.
- Interesting concept or premise
- Some entertaining scenes
- Supporting cast delivers occasional highlights
What Doesn't Work
Despite its strengths, I, Monster has a few issues that may affect the overall viewing experience, particularly in terms of pacing and narrative consistency.
- Uneven pacing in certain parts of the film
- Some predictable plot developments
- May not appeal to audiences outside the Horror fanbase
Story & Plot Summary: I, Monster
Quick Plot Summary: Released in 1971, I, Monster is a Horror, Science Fiction film directed by Stephen Weeks. The narrative crafts an atmosphere of dread and suspense, using psychological terror and visual scares. This summary provides a scannable look at the movie's central conflict involving Christopher Lee.
Ending Explained: I, Monster
I, Monster Ending Explained: Directed by Stephen Weeks, I, Monster attempts to bring together the film’s narrative threads. The ending highlights the core horror themes developed throughout the film.
The final moments emphasize tension and lingering uncertainty, particularly in scenes involving Christopher Lee. The interpretation of the ending may vary among viewers.
Key Elements of the Ending
- Narrative Resolution: The story resolves its primary conflict while leaving room for interpretation.
- Character Development: Character motivations become clearer by the final scenes.
- Thematic Message: The ending reinforces the horror themes introduced earlier in the film.
The final moments of I, Monster reflect the creative choices of the filmmakers and align with the tone of the narrative.
Who Should Watch I, Monster?
Consider Watching If:
- You're a completist for Horror films
- You're curious despite mixed reviews
- You have low expectations and want casual entertainment
Top Cast: I, Monster
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Where to Watch I, Monster Online?
Streaming HubI, Monster Parents Guide & Age Rating
1971 AdvisoryWondering about I, Monster age rating or if it's safe for kids? Here is our cinematic advisory:
⏱️ Runtime & Duration
The total runtime of I, Monster is 70 minutes (1h 10m). Ensuring you have enough time for the full cinematic experience.
Verdict Summary
Analyzing the overall audience sentiment, verified rating of 5.4/10, and global performance metrics, I, Monster is classified as a AVERAGE. It remains an essential part of the 1971 cinematic calendar.
Frequently Asked Questions
Is I, Monster worth watching?
I, Monster is definitely worth watching if you enjoy Horror movies. It has a verified rating of 5.4/10 and stands as a AVERAGE in our box office analysis.
Where can I find I, Monster parents guide and age rating?
The official parents guide for I, Monster identifies it as PG. Our detailed advisory section above covers all content warnings for families.
What is the total runtime of I, Monster?
The total duration of I, Monster is 70 minutes, which is approximately 1h 10m long.
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How I, Monster Compares & Where it Ranks
Critic Reviews for I, Monster
Charles Marlowe is I, Monster. I, Monster is directed by Stephen Weeks and written by Milton Subotsky. An interpretation of Robert Louis Stevenson’s The Strange Case of Dr. Jekyll and Mr. Hyde, it stars Christopher Lee, Peter Cushing, Mike Raven, Richard Hurndall, George Merritt, Kenneth J. Warren, Susan Jameson and Marjie Lawrence. Music is by Carl Davis and cinematography by Moray Grant. Kept By The Power Of God! Stevenson’s age old tale gets another make-over as Dr. Charles Marlowe (Lee) invents a drug that releases his patients’ inhibitions. However, upon trying the drug himself, Marlowe finds that he turns into the monstrous Mr. Blake, who with each transformation becomes more cruel and debauched. Dull and Hyde! Amicus never quite made the mark on British Horror that they aspired to, a few films are enjoyable, certainly there’s good value to be found with some of the segments in their portmanteau releases, but so many others just come off as weak attempts to create a niche in the market. Quite often there was good intentions on the writing table, such is the case with I, Monster, which has literary intentions that are honourable. The Eastman Color photography is lovely, the period design equally so, and the use of canted angles is a good move, but unfortunately the film is just too dull and beset with problems elsewhere. First off is Cushing and Lee, two bona fide legends of British cinema and bastions of horror. Lee is miscast, never quite convincing in the Mr. Blake role, which isn’t helped by the make up work which would look more at home in Carry On Screaming. With Cushing it’s just a case of him being underused, which is unforgivable in a horror film aiming for literary smarts. Carl Davis’ musical score is awful, at times I sounds like something that belongs in a silent movie farce. Starting out as a 3-D venture, that idea was abandoned early in the production, it’s hard to believe that the gimmick would have stopped this being the dreary film that it is. 4/10
**_Amicus’ version of “Dr. Jekyll and Mr. Hyde” with Lee and Cushing_** In 1906, a psychologist in London entertains Freudian theories while experimenting with drug injections, which he eventually tries on himself with damaging results. “I, Monster” (1971) changes the two names of the protagonist/antagonist (Christopher Lee) simply to preserve the surprise of the well-known plot twist in “The Strange Case of Dr. Jekyll and Mr. Hyde.” They did this because there had been so many versions of the story done in cinema by that point. The rival studio, Hammer, did a version eleven years earlier, “The Two Faces of Dr. Jekyll,” and were doing another variation the same year this came out, “Dr. Jekyll and Sister Hyde.” Producers even tried to hide the fact that it was the Dr. Jekyll/Mr. Hyde story in the opening credits when acknowledging Robert Louis Stevenson. I can see why it’s relatively obscure seeing as how it’s nowhere near as entertaining as “Two Faces.” It takes a lowkey approach with a talky focus on the psychology of the novella and inserts Freudian theories into Stevenson's story with the events taking place two decades after the tale was published. Also, the editing is sometimes questionable with certain things ambiguous rather than spelled out, such as the fact that Marlowe injects Diane with his experimental drug. This isn’t shown and the viewer has to connect the dots. I'm assuming the BBC frowned upon depictions of drug injections at the time. Nevertheless, this is one of Lee’s most expressive roles and it’s worth viewing just for that. Also, the psychological theories are interesting and there are entertaining bits throughout. But the idea that Marlowe’s colleagues couldn’t recognize him as Blake is laughable. I guess you have to pretend that he looks different enough than the movie actually shows. It runs 1 hours, 20 minutes, and was shot at Shepperton Studios, which is located just southwest of London. GRADE: B-
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This review has been verified for accuracy and editorial quality by our senior cinematic analysts.
This analysis is compiled by our editorial experts using multi-source verification and audience sentiment data for maximum accuracy.










