At the end of the world, former President of the United States Billy (Mark Duplass) and his science advisor and best friend Ray (Sterling K. Brown) live out their existence in a self-sufficient shelter made by Ray. When the last female fish in their eco system dies, the two become consigned to the fact their days are now number with the artificial ecosystem no longer self-sufficient. However, destruction is averted when one of the remaining male fish begins to undergo sequential hermaphroditism, the process of which allows it to change from male to female and procreate. With the appearance of a mysterious greenlight in the sky, a similar process soon begins to happen to Billy.

Biosphere comes to us from the Duplass Brothers production company and is written and directed by Mel Eslyn along with Mark Duplass who also stars in the movie based on an outline the two developed at a writers retreat in 2018. As one can note from the Duplass films of the past, the brothers have a filmmaking style that often mixes quirky indie tropes around uncomfortable or charged topics. Biosphere is no different here as it takes a very loaded approach and while it has charm and some unique ideas, it also feels like a movie that's maybe a little too stretched.

To start off on a positive note, Sterling K. Brown and Mark Duplass have fantastic chemistry together and with the movie being a chamber piece it definitely needed that authentic buddy dynamic in order to sell this premise with the two being something of an "odd couple" with Ray the more optimistic and knowledgeable one while Billy is the slightly dumber pessimist. The movie itself is rather odd and the best way I can describe it is if we followed Dr. Strangelove past its ending and mixed it with the movie Nothing with a seasoning of Junior (the Schwarzenegger film from 1994). The directions the movie takes are so unexpected (especially going in blind) that I was legitimately engaged in spite of the rather rambling nature of the film. The movie clocks in at about 107 minutes, and it definitely feels like it could've benefitted from being trimmed to a leaner 85 to 90 at most. A big reason is the primary plot doesn't really shift into gear until about a half hour in and that first half hour offers a lot of points that feel repeated throughout the later bit of the film. I certainly enjoyed the shifting character dynamics and relationships in the film, even if the film itself sometimes proved a challenge to get through. Biosphere certainly isn't the first film to go into this kind of territory as it was flirted with in the 1985 science fiction film Enemy Mine and we even saw it explored to a degree in the "Brinky" episode of Pinky and the Brain, and while I definitely prefer those over this given the choice, Biosphere isn't without it's own insights into the premise.

Biosphere won't be for everyone and for people who already like the Duplass brothers or premise you'll need to give the film a lot of patience in order to get to the best parts of the film. For those willing to give it a chance you'll find a flawed movie, but one with some interesting ideas.