Mack & Moxy Episode 8 S.T.E.M. Strong Episode Title:S.T.E.M. Strong.Episode Description:On this mission to save another Great Helpee, the Heroes need Science, Technology, Engineering and Math. With Trooper Xolo, an aspiring engineer, Mack & Moxy head to HelpeeLand and come across a math-loving new friend named Munch Munch. But they're in for a big surprise when they discover that the Great Helpee is hatching atop a volcano covered in hot lava! Together they solve the problem by building a robot. Only one variable - Shelfish Sheldon is bounding up the hillside on a pogo stick, perfectly poised to pounce and keep all the Great Helpee's happiness for himself.