The highly anticipated sci-fi film, Project Hail Mary, starring Ryan Gosling, was released this weekend and proved to be a hit with audiences. Following weeks of buzz and positive reviews, the movie – based on Andy Weir’s novel – quickly broke box office records. Viewers have been captivated by its original story, impressive visuals, and especially by Rocky, the film’s endearing, spider-like alien character. Thanks to its memorable characters, including both Rocky and Gosling’s character Ryland Grace, Project Hail Mary is already considered a standout film of 2026.
As with any book adapted for the screen, the movie version of Project Hail Mary had to cut or shorten some parts of the original story. We’ve already discussed specific storylines and scenes from the book that didn’t make it into the film, but one of the biggest changes involves the characters. The book features a large cast, especially in the Earth-based scenes, but the movie significantly reduces the number of characters, even those who play important roles in the novel. Be warned: the following contains spoilers for both the book and the movie version of Project Hail Mary.
5) Dimitri
In Andy Weir’s Project Hail Mary, Dimitri Komorov is a Russian scientist who comes up with the ingenious idea to power and propel a spacecraft using Astrophage. The story introduces Dimitri and his team early on, and they warmly welcome Grace as she joins their research into this unique substance.
Dimitri’s impact is clearly visible in a key scene where Grace uses a tiny amount of astrophage to instantly melt a metal brick, showcasing its incredible power to the crew. This moment differs from the book, where Dimitri performs the experiment for Grace, rather than the other way around. Unlike some other characters, Dimitri isn’t a one-time appearance in Project Hail Mary; he appears throughout the story, making his absence particularly noticeable for those who read the book.
4) Dr. Francois Leclerc
A particularly surprising moment from the book Project Hail Mary that didn’t make it into the movie involves the decision to detonate nuclear bombs in Antarctica. While it seems strange, this action is crucial to the plot: the explosions release methane gas, which is intended to prevent Earth from getting too cold as the Astrophage blocks the sun’s heat. Because this scene was cut, the character who proposed the idea was also left out of the film adaptation.
About halfway through the novel Project Hail Mary, Dr. François Leclerc is introduced. Stratt explains that Leclerc’s job is to predict how Astrophage will impact Earth’s climate. He faces an almost impossible task, and predicts that in nineteen years, the cooling planet will lead to the death of half the world’s population. This grim forecast, combined with Stratt’s urging to find a way to deliberately warm the planet, leads Leclerc to propose a drastic solution: nuking Antarctica.
3) Dr. Lamai
One significant detail left out of the movie adaptation of Project Hail Mary is the story surrounding the coma-resistance gene. This gene is actually what allows Dr. Ryland Grace to be selected for the Hail Mary mission, but the character central to this plotline doesn’t appear in the film. In the book, Dr. Lamai, a Thai scientist, leads all medical efforts on the Hail Mary and is the one who originally discovered the gene.
In the story, Dr. Lamai is depicted testing an automated version of her technology—originally designed to induce comas for cancer treatment—on unconscious monkeys. This is necessary because the crew of the Hail Mary will be in comas for years during their journey to Tau Ceti. A key scene involves Stratt insisting on being tested for the gene that provides resistance to the effects of the coma technology, and she plans to test everyone working on the Hail Mary mission. This ultimately leads to the discovery that Dr. Grace possesses this gene. Furthermore, Dr. Lamai’s automated medical technology is prominently featured throughout the Project Hail Mary movie, starting from the very beginning.
2) Steve Hatch
A critical part of the Hail Mary mission involves figuring out why Tau Ceti is protected from the Astrophage and then relaying that information back to Earth so scientists can develop a solution. They plan to use small, automated spacecraft called “Beetles” to transmit the data. These Beetles were designed by Steve Hatch, a brilliant Canadian engineer who the author amusingly imagines would have been perfectly portrayed by actor Rick Moranis, if Moranis hadn’t largely retired from filmmaking.
In Project Hail Mary, Ryland Grace learns all about the beetles from Hatch, who excitedly explains their purpose and confidently believes in the success of the mission to solve the Astrophage crisis (and he’s proven correct!). Hatch is also responsible for naming the beetles after the famous band The Beatles – a detail that made it into the movie. However, because Hatch isn’t in the film adaptation, his joke about naming a test beetle “Pete Best” – a reference to the Beatles’ former drummer – was unfortunately cut.
1) Dr. Robert Redell
A strange and fascinating part of the book Project Hail Mary that didn’t make it into the movie involves figuring out how to create enough Astrophage to fuel the spaceship. Once they discovered how to grow it, they needed to find a way to produce a huge quantity. That’s where Dr. Robert Redell comes in – a scientist found in a New Zealand prison by Stratt. Redell had been convicted of manslaughter after an accident at his solar farm killed seven people, but he insists he wasn’t responsible and continues to think like a scientist even while incarcerated.
Stratt and Grace believe they have a solution: growing Astrophage using enormous solar panel farms spread across much of the Sahara Desert. This plan leads to Redell’s release from prison to help with the project. However, both Redell and his specific plan are ultimately removed from the final version of the story, taking with it a demonstration of Stratt’s considerable global influence, which was a key element in the original book.
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2026-03-24 00:15