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6 Episodes
S21 E1 - How Food Works (Part 1)
S21 E2 - How Food Works (Part 2)
S21 E3 - Teeth Clinic
S21 E4 - Asteroid Hunters
S21 E5 - Building Greener Cities
S21 E6 - Kill or Cure? The Story of Venom
Streaming, rent, or buy Catalyst – Season 21:
Currently you are able to watch "Catalyst - Season 21" streaming on ABC iview for free.
Where can I watch Catalyst for free?
Catalyst is available to watch for free today. If you are in Australia, you can:
- Stream 6 episodes online on ABC iview
