Los Jinetes del Alba is a vibrant Spanish mini-series that aired in 1990. This captivating drama primarily unfolds amid the tumultuous period in Spanish history known as the Second Spanish Republic; it creatively interweaves personal stories with broader socio-political developments. The series starring Victoria Abril, Jorge Sanz, and Maribel Verdú expertly brings to the fore intense emotion, arresting drama, and explores several intriguing themes that all add up to an unforgettable viewing experience.

At the heart of Los Jinetes del Alba's storyline is a depiction of a thrilling, passionate, and complex love triangle. The three leading characters, played superbly by Victoria Abril, Jorge Sanz, and Maribel Verdú, manage to capture the viewers' attention from the outset and maintain it throughout the series. Their performances are a key highlight, with each actor breathing life into their characters in a manner that makes them particularly engaging and relatable to the audience.

Victoria Abril plays the role of Florinda, a mother and widow. Still in her youth, Florinda is known not only for her physical attractiveness but also for her strength of character and fierce independence. Employed as a cook at the local coal mine, Florinda finds herself caught in an intense emotional journey, which is both profound and heart-rending. Victoria Abril’s solid performance ensures that viewers are drawn into Florinda's world, feeling deeply for her struggles and losses.

Opposite her, Jorge Sanz plays Xuan, Florinda’s son, who has grown up to become a strong and brave young man. Role of Xuan is central to the plot as he is Florinda's unwavering pillar of support and tries to help build a better life for his family despite the challenges that they face. Sanz’s performance is commendably convincing as he embodies the wide range of emotions that the character experiences in the face of changing times.

Maribel Verdú completes this integral trio, playing Rita, a rich and spoilt young woman. Rita is used to the comforts provided by her wealthy family and has a romantic interest in Xuan. However, her path takes an unexpected turn leading to significant developments in the storyline. Verdú's role is commendably balanced and nuanced, as she brings out the various complexities of Rita's character.

Los Jinetes del Alba isn't just a tale of its characters but is also an exploration of a critical era in Spanish history. Shooting primarily in the rural areas of Asturias, the series beautifully captures the essence of the 1930s - the decade that the narrative encapsulates. The socio-political climate is delicately intertwined with personal stories, and the series successfully mirrors the historical events and issues that mark this period, such as miners’ working conditions and class struggles, providing context and depth to the narrative.

The series is directed by Vicente Aranda, a renowned Spanish filmmaker. He masterfully guides the viewers through the tricky terrains of human emotions and historical chronicles. His meticulous attention to detail and careful selection of locations add a layer of authenticity and richness to the series. Beautiful landscapes, traditional houses, and coal mines captured in the series complement the plot, creating a realistic portrayal of the times.

In terms of technical achievements, the series is marked by impressive cinematography, well-choreographed scenes and the adept use of music to heighten the emotional intensity. The dialogues are crisp and contribute to the development of the characters and the advancement of the plot.

While Los Jinetes del Alba is deeply rooted in its historical setting, the series deals with timeless themes—love, loyalty, struggle, and hope. The personal journey of its characters set against a backdrop of sweeping social changes and political upheaval makes the series both intimate and grand in scope. By deftly balancing its personal and socio-political elements, Los Jinetes del Alba offers a viewing experience that is as informative as it is emotionally moving.

In conclusion, Los Jinetes del Alba is an engrossing Spanish mini-series. Driven by remarkable performances, a compelling narrative arc, and an intimate portrayal of a significant historical era, this series provides a deep dive into the human spirit against the backdrop of social turbulence. It’s a must-watch for those with a keen interest in Spanish cinema and historical dramas.