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Octonauts S4E21 — Octonauts and the Kelp Monster Mystery

8.2

Octonauts•Season 4•Episode 21

Octonauts and the Kelp Monster Mystery

8.2/10 · 13 votesOct 24, 201711 min

Ranked #7 of 23 in Season 4•+0.1 vs season avg

Dashi teams up with her little sister Koshi to help the Octonauts solve a mysterious disappearance in the Kelp Forest. This is the second episode in which is unknown who sounded the Octo-Alert.

Previous episodeE20 · Octonauts and the Bomber Worms Next episodeE22 · Octonauts and the Coconut Crisis

Seasons11

All 1 2 3 4 5 6 7 8 9 10 11

Season 4 Episodes24

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Octonauts and the Poison Dart Frogs

Octonauts and the Hidden Lake still

Octonauts and the Hidden Lake

Octonauts and the Octopod Mystery still

Octonauts and the Octopod Mystery

Octonauts and the Baby Sea Turtles still

Octonauts and the Baby Sea Turtles

Octonauts and the Walrus Pups still

Octonauts and the Walrus Pups

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Octonauts and the Mantis Shrimp

Octonauts and the Loneliest Whale still

Octonauts and the Loneliest Whale

Octonauts and the Tree Lobsters still

Octonauts and the Tree Lobsters

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Octonauts and the Convict Fish

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Octonauts and the Emperor Penguins

Octonauts and the Crawfish still

Octonauts and the Crawfish

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Octonauts and the Flamingos

Octonauts and the Tiger Shark still

Octonauts and the Tiger Shark

Octonauts and the Sunfish still

Octonauts and the Sunfish

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Octonauts and the Coelacanth

Octonauts and the Surfing Snails still

Octonauts and the Surfing Snails

Octonauts and the Yellow Bellied Sea Snakes still

Octonauts and the Yellow Bellied Sea Snakes

Octonauts and the Hippos still

Octonauts and the Hippos

Octonauts and Operation Cooperation still

Octonauts and Operation Cooperation

Octonauts and the Bomber Worms still

Octonauts and the Bomber Worms

Octonauts and the Kelp Monster Mystery still

E21 8.2Now viewing

Octonauts and the Kelp Monster Mystery

Octonauts and the Coconut Crisis still

Octonauts and the Coconut Crisis

Octonauts and the Baby Gator still

Octonauts and the Baby Gator

Octonauts and the Spinner Dolphins still

Octonauts and the Spinner Dolphins

Cast10

Keith Wickham

Keith Wickham

Simon Greenall

Simon Greenall

Jo Wyatt

Jo Wyatt

Rob Rackstraw

Rob Rackstraw

R

Ross Breen

Captain Barnacles

Teresa Gallagher

Teresa Gallagher

Dashi

M

Michael Murphy

Vegimals

Paul Panting

Paul Panting

Peso

Mary Murphy

Mary Murphy

Dashi

Shelley Longworth

Shelley Longworth

Additional Voices

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Episode Summary

"Octonauts and the Kelp Monster Mystery" is episode 21 of Octonauts season 4. It scored 8.2/10 from 13 votes, ranking #7 of 23 episodes this season (season average 8.1). It aired on October 24, 2017.

Next: E22 · Octonauts and the Coconut Crisis Best of Season 4