Infinitum: Subject Unknown (2021) – A Solitary Journey Through Parallel Realities

Science fiction films often explore concepts like time travel, parallel realities, and temporal loops, challenging our perception of reality.
Infinitum: Subject Unknown (2021) is one of those films, presenting an intriguing narrative about a woman trapped in an alternative universe.
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Directed by Matthew Butler-Hart and starring Tori Butler-Hart, the feature stands out not only for its story but also for the circumstances in which it was produced: filmed entirely during the first UK lockdown using an iPhone.
With special appearances by Ian McKellen (X-Men, The Lord of the Rings) and Conleth Hill (Game of Thrones), the film combines an intimate and minimalist approach with complex scientific concepts, creating a unique experience for sci-fi fans.
In this article, we explore the film's plot, production, and impact.
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Synopsis: A Mystery in Temporal Loop

The protagonist, Jane (Tori Butler-Hart), wakes up in an unfamiliar attic, bound and with no memory of how she got there. Disoriented, she manages to free herself and begins exploring the environment, only to realize she's trapped in an alternative reality.
As if that weren't enough, Jane discovers she's living in a temporal loop – each time she dies or reaches a critical point, the cycle restarts, forcing her to relive the same events.
While trying to escape, Jane finds clues left by scientists, including Professor Aaron Östergaard (Conleth Hill) and Dr. Charles Marland-White (Ian McKellen).
Gradually, she begins to understand that she's at the center of an experiment by a secret organization called Wytness, which conducts studies on alternative realities. But the question remains: is there a way out of this infinite cycle?
Production During the Pandemic
Filming and Direction
The great differentiator of Infinitum: Subject Unknown is that it was filmed entirely during the COVID-19 lockdown in the UK.
Director Matthew Butler-Hart and actress Tori Butler-Hart, who also co-wrote the screenplay, decided to make the film with extremely limited resources, using an iPhone as the main camera.
The result is a minimalist aesthetic that reinforces the protagonist's isolation and claustrophobia. The empty city and deserted landscapes are not just narrative choices – they reflect the reality of a world stopped by the pandemic, adding a layer of authenticity to the film.
Performance and Solitary Narrative
With very few characters on screen, Infinitum: Subject Unknown relies entirely on Tori Butler-Hart's performance.
Her acting conveys the confusion, frustration, and desperation of someone who needs to understand her situation and find a solution. The absence of constant human interactions reinforces the feeling of isolation and uncertainty.
Scientific Concepts and Influences
Parallel Realities and Quantum Physics
The plot of Infinitum: Subject Unknown is based on concepts from quantum physics and the multiverse.
The idea that different versions of ourselves exist in alternative realities has been explored in science fiction for decades, and the film plays with this possibility by suggesting that Jane is part of an experiment that tests the transition between dimensions.
This concept has been addressed in films like Interstellar (2014), Primer (2004), and Coherence (2013), which explore different interpretations of spacetime and quantum physics. In Infinitum: Subject Unknown, the approach is more subjective, leaving many questions open for viewer interpretation.
Temporal Loop and Free Will
The idea of being trapped in a temporal loop is a recurring theme in cinema, appearing in films like Groundhog Day (1993), Edge of Tomorrow (2014), and Triangle (2009).
However, Infinitum: Subject Unknown adds an extra element: the fact that the loop is not simply a random phenomenon, but part of a controlled experiment.
This raises questions about free will: Does Jane really have control over her actions, or is she just following a script predetermined by the scientists watching her? Infinitum: Subject Unknown doesn't offer definitive answers, leaving room for interpretation.
Critical and Audience Reception
Positive Reviews
- The creativity and innovation in production were widely praised.
- Tori Butler-Hart's performance was highlighted as one of the film's high points.
- The use of isolation and minimalist aesthetics were seen as an effective reflection of the pandemic period.
Negative Reviews
- Some critics pointed out that the plot could have been more developed, with more explanations about the film's universe.
- The pace sometimes becomes repetitive, which can test the viewer's patience.
- The appearances of Ian McKellen and Conleth Hill, while eye-catching in promotional material, are very brief, which may disappoint some fans.
Overall, the film received mixed reviews, with a rating of 75% on Rotten Tomatoes. While some viewers appreciated the experimental and atmospheric approach, others felt the narrative lacked depth.
Conclusion

Infinitum: Subject Unknown is not a conventional sci-fi film. It combines a cerebral narrative with a minimalist visual approach, creating an immersive and intriguing experience.
Its concept of parallel realities and temporal loops makes it a good choice for sci-fi fans who appreciate stories that defy logic and play with the possibilities of spacetime.
Despite limitations due to its budget and production method, Infinitum: Subject Unknown stands out as an example of creativity in times of adversity.
If you like films like Coherence and Primer, and don't mind a more contemplative pace, this could be an interesting cinematic experience.
Watch the "Infinitum: Subject Unknown" trailer
In Brazil, "Infinitum: Subject Unknown" is available on Amazon Prime Video.




