BULA'S SPIN PARTY: The Zpers learn about rotation as they practice a dance routine to compete in Bula's Zula Spin Party dance contest. Meanwhile Dark Truder, who wasn't invited, crashes the party disguised as a mysterious dancing planet so he can ruin it for everyone else. DAY FOR NIGHT: Dark Truder has somehow stolen daytime from the planet Zula, and won't give it back till the Zuleans accept him as Master Of The Universe. The Zula Patrollers assume he has hijacked the Sun, and go looking for it. They discover that Truder hasn't made off with the sun, but has invented a Ray that has stopped Zula from turning.