Search for Second Earth - Episode Guide

For as long as we've had eyes to see and minds to wonder we've marvelled at the stars. But it was only on the eve of the 21st Century that a handful of scientists dared to gaze into the gloom between, believing planets like our own Earth could be found there. Since the discovery of the first so-called exoplanet in 1994, the Planet Hunters have transformed the way we see the universe. We now know that every star in the sky has at least one planet. How many of them might host life?

The new space race has begun. After more than 50 years exploring nearby planets, it's time to venture beyond our solar system to explore alien worlds orbiting distant suns.

The discovery of Earth-like worlds outside our solar system has reset the odds of finding a Second Genesis beyond our planet. Could life on Earth be the product of a random miracle, never to be repeated?

Are we alone? From the moment we were conscious as a species, we have been on a quest to answer this question. (Final)