When villain mastermind William Ocean plans to cover the entire world in water, the Mobile Unit heads to his underwater lair. Then, the Dream Weaver is turning Little O's dreams into nightmares. Now that she isn't getting much sleep, cases are piling up! Learning goals: Patterns / Process of elimination

Originally released by PBS, 2021. Streaming video file encoded with permission for digital streaming by Infobase on July 18, 2022.