The fugitives struggle to escape a gorilla outpost, but once past they discover they have broken into a prison camp for renegade humans. With the willing help of the prisoners they search for a way to escape and find a way when they discover an outlet of natural gas. Working all day, they construct a hot air balloon, basket and two humanoid dummies. They release the balloon the next morning and most of the gorillas go in pursuit, thinking that humans are escaping in it. To distract the remaining guards Pete blows up the gas outlet. With all the guards taken care of, the humans escape and disperse into small groups.