Poisoned by Polonium: The Litvinenko File is a revolutionary 2007 documentary film, featuring critical personas Alexander Litvinenko, Marina Litvinenko, and Walter Litvinenko. This compelling movie dramatizes the suspicious and tragic circumstances surrounding the life and death of former KGB and FSB agent Alexander Litvinenko, who mysteriously passed away from alleged poisoning.

Director Andrei Nekrasov explores the murky realms of international espionage, political intrigue, and dangerous secrets. It also delves into deep-seated issues in post-Soviet Russia, giving audiences a gritty and often unsettling look at the world behind closed Kremlin doors. The movie presents a high-stakes narrative that feels palpably real, with its compilation of interviews, actual footages, and thought-provoking commentaries.

At the center of the movie is Alexander Litvinenko, a former Russian security officer who was once on the inside of the country's spy agency. Known for his stern criticism of the Kremlin administration, his fiery challenges against corruption, organized crime, and human rights abuses, Alexander quickly became a controversial figure in the eyes of his country's leadership. However, all these things are portrayed in an upfront and unapologetic manner, making the audience aware of the perilous life of truth seekers.

Marina Litvinenko, his wife, is also a predominant figure in the film. Through her, we are privy to the personal lens of Alexander's life — in contrast to his public image as an outspoken critic. It's through her heartfelt narratives that we understand the man behind the scandals and the emotional toll that his path took on their family. Walter Litvinko, Alexander's father, adds another layer to the family's perspective.

Poisoned by Polonium: The Litvinenko File artfully narrates the frightening reality of what can happen when speaking against people in power. Providing a behind-the-scenes look at the Kremlin's deep-rooted corruption, the film puts political manipulations and deadly consequences of free speech at its forefront, personally embodied by Alexander Litvinenko's tragic fate.

The title 'Poisoned by Polonium' refers to the radioactive substance found in Litvinenko's body upon his death in 2006 in London. The film takes its viewers down the rabbit hole of international politics and the stark realities of being a dissident in the modern era. Nekrasov encapsulates the chilling tale of truth-telling in the face of grave danger and reflects upon the lengths to which powerful entities might go to suppress the courage of conviction.

Furthermore, the film subtly reminds its viewers of the striking pertinence to global events beyond Russia, thus making it a must-watch for students of geopolitical dynamics. The film helps comprehend how far-reaching the tendrils of power and corruption can be, besides shedding light on how they not only affect national politics but also seep into the international realm.

In detailing the complexity of Litvinenko's life, Nekrasov blends personal and political dramas, creating a film that is both a captivating spy thriller and an affecting true story. Viewers get insights into the psychological makeup of a man who dared to challenge the authorities, thus offering a study in bravery, moral standing, and ultimate sacrifice.

Poisoned by Polonium: The Litvinenko File is visually innovative as well. It doesn't resort to the talking heads and static scenery of traditional documentaries, instead masterfully balancing mystery-laden staged recreations with photography, animation, and archival footage.

In summary, Poisoned by Polonium: The Litvinenko File is more than a deep-dive into the mysterious death of a notorious figure. It's an invaluable investigation into the underbelly of contemporary global politics, a heartrending testament to the strength of character, and a stark reminder of the costs some have to pay for truth. It is a riveting film - full of stunning revelations, emotional subtexts, and thought-provoking messages about freedom, courage, and the consequences of speaking truth to power.