"Simon & Marcy" is the fourteenth episode of the fifth 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 March 25, 2013 together with the fourth season episode "I Remember You", and as such was advertised as a half-hour special.