What is the episode in Malcolm in the middle when Dewey...?

What is the episode in Malcolm in the middle when Dewey has a baby sitter but then she dies and Dewey goes out to adventure himself. I would like to have the name of the episode and what season it is in.here is a link to watch some free episodes of Malcolm in the middle. http://watchxonline.com/category/108-malcolm-in-the-middle.php