When an Action Hank episode is interrupted by the Emergency Broadcast System, Dexter sets about fixing any emergencies in the neighborhood, hoping to make the signal go away.
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Past the vaulted doors lives the smartest boy the world has ever seen, Dexter, boy genius! He's constantly creating dazzling, world-saving inventions in his secret laboratory. His big sister Dee Dee frequently wrecks his experiments. However, he has bigger problems such as his nemesis, Mandark, his brilliant rival at Huber Elementary School. Mom and Dad, of course, have no idea what their little angel is up to.