Catalyst Season 23 Episode release dates & where to watch

1. The Secret Lives of Our Urban Birds

Nature journalist and self-confessed bird-nerd, Ann Jones, heads out on an urban safari through Melbourne, uncovering the secret lives of the city's feathery friends.

2. The Big Brew Challenge

Celebrate the science of beer with chef Paul West, as three teams of budding brewmasters take on the challenge to make their best homebrew. But do they have what it takes to impress our panel of international judges?

3. Miracle Babies: Operation Hope

This intimate look at the awe-inspiring world of fetal surgery is a story of hope and trailblazing medicine. Follow pioneering doctors as they help parents face agonising decisions about their baby's future.

4. Forever Young? The Rise of Injectables

Australians spend over a billion dollars on injectable treatments annually and clients seeking "tweakments" are getting younger. We explore the psychology behind this trend and the consequences of pursuing perfection.

5. Solar Storms: A Warning from Space

Solar storms, eruptions from the Sun with the power of 20 nuclear bombs, have the potential to hit earth in just two days. A direct hit would obliterate our technology from satellites to smart phones. We need advance warning.

6. The Science of Relationships Finale

The happiest 50-year-olds are living to be the healthiest 80-year-olds. Their secret? Relationships. Lily Serna explores how to live a healthier and more satisfying life through the science of our social connections.