Casshern Sins (Season 1)

"Casshern Sins" (2008) — watch online this Japanese animated series from Madhouse, a dark post-apocalyptic drama set in a world that is rotting from the inside. A figure in a white combat suit wakes with no memory of his past. His name is Casshern. Everyone wants him dead.

After the assassination of Luna — the being who carried the promise of eternal life — the mechanical civilization ruling the planet began to corrode and collapse. A plague called "The Ruin" spreads through robots and humans alike. Casshern alone stays intact. Some hunt him down to destroy what they see as the source of the plague. Others track him hoping to absorb his power and cheat death. He travels the devastated landscape, chasing fragments of a history he cannot remember.

Twenty-four episodes aired in 2008. The series runs closer to philosophical tragedy than action anime — slow, heavy, and built around guilt and redemption rather than fights. If you are looking for something that earns its darkness, stream all episodes of Casshern Sins online on iFILM.