archytele The Vault
Episode guide

S3·E18 The Urchin Invasion

Episode
Season 3, Episode 18
Air Date
March 21, 2014
Runtime
11 minutes
Story Type
Core Character Arc
Core Aired March 21, 2014 11 min
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Synopsis

The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle - only to find the forest endangered by an infestation of kelp-eating urchins!

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Frequently Asked Questions

When did Season 3 Episode 18 of Octonauts air?

Season 3, Episode 18 ('The Urchin Invasion') originally aired on March 21, 2014.

How long is Season 3 Episode 18 ('The Urchin Invasion')?

The runtime for this episode is approximately 11 minutes.

What happens in Octonauts Season 3 Episode 18?

The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle - only to find the forest endangered by an infestation of kelp-eating urchins!...

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