CatalystSeries 20Season 20 · 2019 · 8 episodesEpisodes1Allergy ClinicWith Australia in the grip of an allergy epidemic, we set up a pop-up clinic to understand why so many of us are suffering from these conditions and reveal the latest science about what we can do to treat and prevent them.2The Mindfulness ExperimentCatalyst brings together 15 ordinary Australians to take part in a revealing scientific experiment - to see if practicing mindfulness can help treat conditions like chronic pain, anxiety and stress that affect millions of us.3Black Hole HuntersProfessor Tamara Davis meets the scientists on a quest to hunt down black holes, the journey has brought us to the cusp of an unprecedented milestone in scientific achievement - to photograph a black hole for the first time.4Staying Younger for Longer: BodyIan Henderson, the recently retired and much loved ABC newsreader, sets out on a quest to find the secret to ageing healthily, and along the way uncovers some amazing new science that could benefit us all.5Staying Younger for Longer: BrainDr Sarah McKay uncovers the revolutionary new science that promises to keep your brain healthy into old age - and uncovers the drugs that hope to defeat many of the diseases of ageing.6Should I Risk It?Lily Serna finds out how maths can help us all become smarter with the risks we take in life. And she discovers that far from taking too many risks, many of us are playing it too safe.7Face Surgeons: Inside the Craniofacial UnitFor 6 weeks, Catalyst was given unprecedented access to an incredible unit that performs some of the most complex and specialised craniofacial surgery in the world to help rebuild people's faces and lives.8Investigating Body DysmorphiaJournalist Ruby Jones meets some of the 2.5 million Australians whom body image concerns have become a serious mental health issue. Ruby discovers that far from vanity these disorders are crippling people's lives.Season 1Season 15Season 16Season 17Season 18Season 19Season 21Season 22Season 23