Flipper fights an undersea battle with a nitrogen narcosis drugged diver in an attempt to drive him to the surface before a nearby charge of dynamite explodes.
Flipper and Sandy are duped into helping a spy when a secret instrument package from a rocket is lost in Coral Key Park.
Like the heroes he sees on TV, Bud tries to rescue a damsel in distress but fails to tell Porter or Sandy of his intentions, and suddenly finds himself caught in a dangerous riptide.
