The Bug Rangers are trying to earn their latest merit badges. Cosmo thinks he's doomed to be 'just a brainiac' until he accidentally comes into possession of The Bulging Muscles Badges and discovers he has all kinds of athletic abilities he never imagined. Is the merit badge giving him the power to go up against the neightborhood jock - and actually hold his own? Grandpa Lou tells the story of a fellow named Samson, who mistakenly believed his strength came from his long, flowing hair.