Season 1

Alien Worlds (2020), Season 1 is a science documentary you can watch online on iFILM — four episodes that take the rules of life on Earth and apply them to planets we've never seen.

Each hour is built around a single imagined world and the problem its biology has to solve. On Atlas, heavy gravity thickens the air until creatures can stay aloft for life. Janus is reasoned out from ants, scorpions and fireflies, leading to nimble five-limbed pentapods. Eden sits under twin stars in an oxygen-rich haze, its biosphere running on Earth-like cycles of hunting and breeding. And on Terra, orbiting a dying sun, an advanced species has to pack up and colonize somewhere new using robots. Real biologists do the math; animation does the rest.

This British production sits in the Planet Earth tradition, only the wildlife is a set of educated guesses. The season's strength is restraint — every alien is anchored to actual science rather than invented for spectacle. Good for anyone drawn to astrobiology and a calm voice over the visuals. Stream Alien Worlds Season 1 online on iFILM.