Darwin’s Darkest Hour is an intimate, riveting drama that dips into the historical timeline to bring light upon a critical period in the life of acclaimed naturalist and geologist, Charles Darwin. By combining a captivate narrative with an interesting exploration of social, scientific and religious ideas of that time, the film presents a multifaceted perspective on the struggles faced by Darwin and how it catalyzed his breakthrough theories.

Taking place in 1858, the movie sets into motion by focusing on Darwin, played by Henry Ian Cusick, in the throes of writing his groundbreaking and controversial work, "The Origin of Species". Known primarily for his evolutionary theory, Darwin was a trailblazer whose ideas about natural selection defied the prevailing notions about life's development and existence. Yet, beyond his scientific endeavors, he was also a man grappling with personal turmoil and outside pressures.

The film provides a rich interior view of Darwin's world, shedding light on his nuanced relationships, his overarching ambition, doubts over his radical ideas, and his attempts to reconcile his scientific findings with his religious beliefs. It focuses on the personal stress and anxiety he encountered as he embarked on a path that would eventually redefine the way people perceived and understood the world.

Darwin’s Darkest Hour also provides a brilliantly detailed depiction of Darwin’s domestic life. Darwin’s wife Emma, portrayed by Frances O’Connor, plays a significant part in the unfolding story. She is seen as an endlessly patient and supportive woman, who despite having firm Christian beliefs, stands by her husband's side as he grapples with his revolutionary thoughts that seemingly contradict their faith. The chemistry between the on-screen couple offers tender moments highlighting the complexities of their intimate relationship in the face of brewing religious and scientific dissent.

An essential part of the narrative is the letter from the naturalist Alfred Russel Wallace (played by Gavin Mitchell). Wallace, who independently conceived a theory incredibly similar to Darwin’s, poses an intellectual challenge and a race against time that further inflates the stakes for Darwin. The fear of being overshadowed casts into relief Darwin's desire for recognition and the pressure to publish his revolutionary work.

Filmed in Canada, the cinematography of Darwin's Darkest Hour wonderfully emulates the 19th-century Victorian ambience of England. The immaculate attention to period detail, beautiful landscapes, and a stunning visualization of Darwin's ‘Thinking Path’ enhances the movie's visual appeal, significantly contributing to the storytelling.

As compelling as the storyline is, the movie is also an emotional journey that examines the personal costs of scientific exploration. It contemplates how Darwin reconciled his love for his wife and respect for her faith balanced against the purity of his acknowledgement that his theories would disrupt the established notions of creation so fundamentally rooted in society. Not merely a biography style film, Darwin's Darkest Hour offers a humanizing portrait of a man prior to achieving lasting fame, facing immense emotional and intellectual battles.

The performances in this historical drama are highly commendable, with Cusick lending a sense of authenticity and humanness to Darwin. His portrayal of Darwin's struggle with illness, family pressures, and personal insecurities deepen the viewer's empathy and understanding of the man behind the 'Evolution Theory'.

Darwin’s Darkest Hour, nuances the immense public and personal costs that scientific discovery carries. The film subtly underlines the courage it often demands to stand against one's contemporaries and dare to change the world. It offers an inspiring testament to the lengths individuals like Darwin went to with the hope of enlightening humanity. The film is a blend of historical accuracy, psychological integrity, and a deep dive into the emotional underbelly of one of the history’s most significant scientific minds.

In summary, Darwin's Darkest Hour is an enthralling period drama that encapsulates the tension, crisis, and triumph in the life of Charles Darwin. Layered with a strong script, brilliant performance, and period detail, it is a viewing experience that expertly fuses the elements of history, science, and human drama. The film is recommended for those fascinated by the intersection of science, religion and personal resolve, and promises a unique insight into the life of a man whose work continues to shape our understanding of the world to this very day.