AllMovie

The Brain returns, this time equipped with a gigantic computer (they were ALWAYS gigantic in the 1960s!) which gives him access to all known facts about Aquaman. Using the information at hand, the Brain figures that the best way to vanquish the "Sea King" is to use an Oxymite buoyancy ray, which causes everything on the ocean floor that isn't nailed down to float upward--including Aqualad and Tusky. To save his friends from certain death at the ocean's surface, Aquaman enlists the aid of an enormous "cyclops" fish.