Jack goes down a water drain to retrieve Sam’s missing toy and is accidentally washed out to sea. With his jetpack on the fritz, Jack's only way back is to hitch a ride via the water cycle.

Jack is a fun‐loving alien explorer whose coolest discovery yet is the amazing "Planet Earth"! With the help of his alien dog Rocket and his robotic assistant CHIP, he sets out on a series of fun and daring adventures to learn all about this strange newplanet! Showing him the ropes are his three new friends: a nine‐year‐old boy named Nico, his little sister Sam, and their slacker pal Yoki. Together they help Jack (and us!) understand how things work here on Earth...and beyond!