Catalyst Season 15 Episode release dates & where to watch

1. Meteors, Sea Level Rise, House Fires

The Catalyst team look at what YouTube can teach us about meteors and how far can sea levels rise? Also how to stay as safe as possible in a house fire.

2. Tattoos, Moon Mining, Muscle Fibre

Tattoos: They are on trend but how easy are they to remove? Moon Mining: Scientists look at ways to mine the moon. Muscle fibre Fishing Line: How fishing line, a hairdryer and an electric drill make artificial muscle fibres.

3. Omega 3 Inmates, Antarctic Sea Ice, Dog Optimism

Could omega 3 supplements reduce aggressive behaviour of inmates?; Antarctica Sea Ice: The sleeping giant of climate change; Dog Optimism: How does your dog view the world? Is it an optimist or pessimist?

4. Radiation Fallout, Multiple Organ Failure

Three years after the Fukushima nuclear disaster we explore the hidden impact of radioactive sediments and why do some trauma patients appear to recover from injury but just a few days later develop multiple organ failure?

5. Gut Reaction: Part 1 - What You Eat Could Be Making You Ill

In the first of a two-part special, reporter Dr. Graham Phillips investigates whether what we feed the bacteria deep inside our gut could be contributing to a whole litany of diseases.

6. Gut Reaction: Part 2 - Let Food Be Thy Medicine

In this two-part Gut Reaction special, reporter Dr. Graham Phillips investigates whether the Western diet could be contributing to a whole litany of diseases by causing an imbalance in the bacteria deep inside our gut.

7. AE2 - The Silent ANZAC, Where Does Fat Go?

Inside Australia's long lost World War 1 submarine, the AE2, we reveal her hidden secrets and investigate what scientists are doing to protect her from the ravages of time.

8. Epilepsy, Brian Schmidt

Catalyst investigates two ground breaking treatment procedures for epilepsy; We meet the man who discovered dark energy - Nobel Prize winner Professor Brian Schmidt.

9. Dr. Jane Goodall Profile, Mystery Mummy, Eureka Prizes

Dr. Jane Goodall entered the forests of Tanzania as a girl with a dream. Twenty years later she left a woman with a mission; Can science help the dead speak? We 'unwrap' a mummy to unveil secrets hidden for thousands of years.

10. Testosterone - It's Not All About Sex

Dr. Graham Phillips delves into the latest research on testosterone, from the womb to old age, it moulds the male body & mind. It is also a hormone of good health during the life of both men & women.

11. Honey Bees, Drinking Water, Driver Distraction

Catalyst investigates how modern agriculture methods, increasing diseases and the impending threat of the deadly varroa mite could destroy the last safe-haven for bees on the planet.

12. Mega Tsunamis, Allergy Pill, Nature Play

Ground breaking Japanese research reveals clues about future hazards for tsunami-prone countries. How playing outdoors can improve children's health and could the bacteria in our stomach ulcers help cure allergies.

13. Falling In Friendship

Friendship: From before we can even speak, we seek the companionship of others. But why is this drive so powerful? And how come out of all the people we meet in our lives, we fall in friendship with some and not others?

14. Global Warming Pause, Virtual Universe, Green Alloys

Global Warming Pause: The big question in climate science - what happened to global warming? Virtual universe - reveals the life of the universe. Green alloys - 'reincarnating' CDs, pushbike and car parts.

15. Tokyo Flood Prevention, Crying, Open Plan Office

Tokyo flood prevention - How does a city of rivers defend itself in during flooding rain? Crying - are tears of joy different from tears of sorrow? Open plan office layout - how the open plan office can affect our health.

16. The Wind, Bird Strike

What does it mean when the weather report says - winds will be up to 50kph... How much notice should we really take?; With planes and birds sharing our skies, how common are collisions and how can they be avoided.

17. Aircraft Electromagnetic Interference, Tilapia, Laser Danger

How Aircraft Electromagnetic Interference (AEI) affects our military aircraft; Detecting Tilapia; the cane toads of our waterways and what makes Lasers so dangerous?

18. Low Carb Diet - Fat or Fiction?

Catalyst investigates the science behind the low carb diet. What are the health benefits and are there any risks? Is it suitable for everyone?

19. Genetic ID, Tunnel Borer, Coral Trout

The Catalyst team look at how our genes can affect exercise performance; Come face to face with 120 metre tunnel borers Florence and Elizabeth; And reveal the good news for Coral trout on the Great Barrier Reef.

20. Antiviral Abalone, Fermat's Theorem, Predator Scat

Could abalone blood be the new treatment for cold sores and herpes?; The inspirational story of 350 year old mathematics problem and how it was solved; Tasmania's Great Poo Hunt - have foxes invaded the island state?

21. Future Cities

With a soaring population how do we keep our cities liveable? And what will the city of tomorrow look like? Catalyst reporter Anja Taylor investigates some innovative ideas for Australia's future cities.

22. Implant Protection, What Rat Is That?, Science Of The Perfect Drink Finale

Reporter Mark Horstman gives up some of his own blood to test specially coated stents that can mimic the blood vessel wall and Dr Jonica Newby is on a mission to find out what's been lurking in the back yard.