From a press release...
Brobee and Muno build a boy's clubhouse but won't let Foofa and Toodee play. Meanwhile DJ Lance and Plex help Foofa and Toodee build an awesome treehouse where they allow everyone to play.
GUEST STARS: Erykah Badu, The Sounds, Mark Mothersbaugh
Muno and friends go on an Indiana Jones like adventure! They travel through a jungle under Gabbaland and find the golden treasure.
GUEST STARS: The Killers, Mark Mothersbaugh
All the characters in Gabba Land use the outdoors and friends to capture the happiness of summertime. In "Bubbles", "Summertime", and "Jumpy Jump" all the characters have fun doing different outdoor activities. Then as all the characters have a pool party they learn to take turns on the slide in the "Wait your turn" song.
GUEST STARS: The Aquabats
Foofa loves animals and she tracks an animal to find out about it. The Gabba gang also discovers some silly animals that only could be found in Gabbaland. Foofa teaches how to care for a pet friend or plant friend and becomes queen of the animals.
GUEST STARS: Jack McBrayer, Paul Scheer, Jimmy Eat World, Mark Mothersbaugh