Discusses the parts of the eye, how they function to produce the phenomenon of vision in humans and animals, and other aspects of the act of seeing.

Describes the different bones and muscles in the human body, giving their locations and functions.

As the Hulk battles the Maestro, the Destroyer and the alien Troyjan, Banner begins to believe that he and the Hulk could be...happy? But when an unthinkable tragedy suddenly strikes, everything changes! Grieving and tormented, Banner seeks answers--while the enraged Hulk smashes his way through adversaries from Attuma to the Super-Adaptoid! The Circus of Crime wants to use the Hulk, while the alien Qnax needs his help! But as shocking secrets are...