Dashi, Tweak, and Peso escort a swarm of Monarch butterflies as they migrate south for the winter, and have to think fast when the insects' traditional route is intercepted by a tornado!

The Octonauts head to the Yangtze River to help Min the Mapmaker, an old friend of Inkling's, who's been trapped by a mysterious creature. Turns out, It was just a Chinese giant salamander ...