The Angry Beavers (1997)

S3E26 I Am Not an Animal, I'm Scientist #1

A quirky scientist clad in a white lab coat undergoes a bizarre transformation into a beaver. Embracing his new form, he cleverly constructs an advanced dam that outsmarts two unsuspecting brothers. As they struggle to comprehend the situation, the scientist uses his intelligence and ingenuity to thrive in his new role, leaving the brothers baffled in his wake.