Siren (2018–2020) is a captivating fantasy-drama series that reinvents mermaid mythology with a darker and more complex tone. Set in the coastal town of Bristol Cove, a place steeped in legends about sirens, the story begins when a fierce mermaid named Ryn emerges from the ocean to search for her missing sister. Her arrival sparks chaos, as she disrupts the quiet town and comes into conflict with the local residents. Marine biologists Ben and Maddie become deeply involved as they study Ryn and uncover the hidden world beneath the waves.
The character of Ryn stands out as both terrifying and sympathetic—she is a wild creature struggling to survive in an unfamiliar environment, driven by loyalty to her family. The series does a great job of balancing moments of horror, such as Ryn’s sharp teeth and predatory nature, with scenes showing her growing connections with Ben and Maddie. Bristol Cove itself serves as an atmospheric backdrop, contrasting its idyllic small-town vibe with the darker mysteries of the sea.
Over the course of three seasons, Siren expands its scope and mythology. New merfolk arrive onshore due to environmental changes, and the show explores themes of identity, belonging, and the conflict between humans and mermaids. The relationships between characters deepen, especially as human characters like Ben experience changes influenced by mermaid biology. The third season dives into tribal politics among the merfolk and introduces a powerful antagonist seeking to unite or dominate their kind in a looming war against humans.
The show received praise for its inventive and empathetic portrayal of mermaids, combining strong performances, atmospheric storytelling, and impressive creature design. However, some critics noted uneven pacing and that supporting characters outside Ryn were less developed. The show’s blend of teen drama sometimes diluted its darker and more original horror elements.
Despite its cancellation after three seasons, Siren built a dedicated fanbase who admired its unique take on supernatural storytelling. By portraying mermaids not as gentle or mythical beings but as dangerous and complex creatures, the series offered fresh commentary on human assumptions about nature and otherness. Ultimately, Siren remains a standout series for those who enjoy dark fantasy and supernatural drama, leaving a lasting impression with its mix of action, emotion, and myth.