"They’re not righteous, they’re wrongteous! Hook up with Finn and Jake as they travel the Land of Ooo searching for adventure. But remember, adventure isn’t always easy. Sometimes you’ve got to battle fire gnomes that torture old ladies, save a smelly hot dog princess from the Ice King, and thaw out a bunch of frozen business men. What the cabbage?! Get ready for some seriously unserious adventure in the first season of Adventure Time!" -- iTunes Store
Download for Free!
"Trouble in Lumpy Space" - Jake starts to turn lumpy after being bitten by Lumpy Space Princess. It's up to Finn to venture to another dimension, Lumpy Space, where he must find a cure that will save his friend.
the fine print: Downloads posted on the Free iTunes Downloads blog are usually free for ~1 week. After that, you'll have to pay for them.