 " Hot to the Touch " is the first episode of the fourth season of the American animated television series Adventure Time . The episode was written and storyboarded by Cole Sanchez and Rebecca Sugar , from a story by Patrick McHale , Kent Osborne , and Pendleton Ward . It originally aired on Cartoon Network on April 2 , 2012 . The episode serves as a direct continuation of the third season episode " Incendium " . 
