When did Catalyst Season 18 Episode 4 air?
Catalyst Season 18 Episode 4 aired on September 5, 2017.


Catalyst is Australia's premier science investigation series. Each week the team brings you stories from Australia and around the world, meeting scientists at the forefront of discovery.

66 million years ago an asteroid hit the planet. Now an expedition is underway to drill 1500m into the crater it created - the Chicxulub asteroid impact crater, aiming to unearthing the secrets that killed the dinosaurs.
Direct answers for episode-level questions and details.
Catalyst Season 18 Episode 4 aired on September 5, 2017.
This episode runs for approximately 30 minutes.
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