A purple alien and three kids, Kristine, Kevin and Brian try to save the environment. They are often helped by Megabrain who is only a floating head with hands

The theme lyrics:(listen/read carefully as many people dont interperate this correctly)

"Danger and evil are everywhere,
Nature called he didn't care,
Who can help the world survive,
Who can keep a dream alive?
alive alive!"

"An Awesome alien hero,
was destine to hear the cry,
A watcher known as widget,
he shot down from the sky!"
"woh-oh woh-oh,
Widget the world watcher
woh-oh woh-oh,
Widget the world watcher"