Another big reveal that is uncovered by the end of the film is what is actually happening to all of the extra siblings who are discovered by the bureau. Nicolette Cayman assures the public that all but the eldest siblings are put into cryosleep to ensure their safety. However, when Adrian Knowles manages to sneak Thursday into the headquarters, it's discovered that Cayman's tales are all lies, as they incinerate a child right before their eyes.
Thursday records the cruel act and shows it during Cayman's campaign fundraiser happening shortly after, and chaos ensues, leading to Monday getting fatally shot, Cayman being sentenced to death, and the one-child policy getting revoked. Despite her death, Monday's children are saved and develop in an artificial womb, and the final image of "What Happened To Monday" sees nurses tending to several hundred newborns in an enormous ward.
So it all seems like a happy ending right? Well, not exactly. This is where the film's themes of morals versus societal needs come to a conclusion. While it is satisfying to know that families no longer have to be burdened and no more children will be killed, the fact remains that the overpopulation problem is still a very real dilemma. Cayman's ideas, although immoral and full of lies, are not completely unjustified, and without the one-child policy, this version of humanity is in for some trying times ahead.
Like any good dystopian sci-fi, "What Happened to Monday" forces us to reexamine the world we live in. What problems could be solved if we put aside our selfish desires? Will a day ever come when it's too late to turn back? Or can we adjust to working together for the betterment of mankind? Regardless of how you take the ending, there's no question that "What Happened to Monday" leaves more than enough food for thought to last a lifetime.
