Night Fall: Coop has captured Master Yo for Night Master! Yin & Yang need help & they get Roger Jr.'s & Carl's help but when it seems Carl can't be trusted, Coop offers to help the heros search for the broken Toilet Brush of Illumination parts so the student's can defeat Night Master. While the other guys don't have any luck in receiving the scrubby part, Coop & Yin have an easy time getting the handle. Yin proves she trusts Coop & gives him the handle. Yet Coop's bliss is short as Night Master interrupts & blows Coop's cover! If Yin thinks she's angry as she thought she'd been nice to Coop, Coop proves angrier as he reveals Yin had never been nice to him! With Night Master powering up the Geosynchronometer with Yo's Woo Foo Aura, can Yin & Yang break out in time?moreless
Attack of the Lesson: Two evil spirits are released from their jars. They go to corrupt innocent beings into over-eating and laziness. But everybody is already like this, so the spirits have no work. A super-hero named The Lesson comes from beyond to make the city right again, but nobody is forcing the citizens to make bad habits, they're doing it of their own choice. The Lesson decides to force the citizens to learn a lesson even if it hurts them! Can Yin & Yang beat the Lesson by teaching him a lesson?
A Case of Evils: After Master Yo accidentally drinks a soda Carl drank out of, Master Yo swallows some of Carl's backwash. This causes Master Yo to slowly become evil with increasing intensity! Can Master Yo's students prevail and teach the master?
Bad Nanny Jamma: Saranoia wants to destroy Yang! The easiest way to do this is going to Master Yo's Dojo & destroy Yang there. To get in, Saranoia uses a broom wand to transform her into a maid. Unfortunatly for her, the wand has it's own mind & won't let Saranoia destroy Yang until the Dojo is spotless! How will Yin & Yang abuse this advantage?
Pros and Cons: Carl thinks the factor that keeps him from being a great villain is the fact he doesn't have even one henchman! When he hears Night Master is holding an Evil Convention in town and every villain in town is invited, Carl goes there hoping to find a henchman. Meanwhile, Yin & Yang are in disguise there, hoping to find out about Night Master's ultra Master Plan!
Master Dave: The Tree Stump Kid named Dave is disappointed his friends Yin & Yang missed his birthday party. To make up for it, Yin & Yang promise to do anything to Dave to make it up to him. When Dave learns he has a "Day After His Birthday Party," coming up, he convinces Yin & Yang to pretend to be his students. But Master Yo warns Yin & Yang no good can come out of lying. What will be the consequences of Dave's lying, and can Yin & Yang save Dave from those consequences?
Destination Danger: Years ago, Master Yo gave a powerful weapon, the Knuckles of Infinite Smackdown, to his friend Gumpy for safekeeping. But now that the Night Master is after it, Master Yo must take Yin & Yang on a road trip and try to throw the Night Master's lackey's, Dank and Dire, off of Master Yo's trail. Will he be sucessful?