Doctor of Animal Psychology at Los Angeles Zoo, Lewis Dixon and Dr. Stephanie "Stevie" Branton were put in charge of the study of the ape astronauts who mysteriously appeared from space. He became a member of the Presidential Commission of Inquiry. Cornelius and Zira told him that Taylor had died, what they did to humans, and about the Earth's destruction. He was shocked, but he understood why they needed to keep their secrets. Horrified at the plot to wipe out the talking apes, he assisted their escape and arranged for circus owner Armando to look after their infant son in the event of their death.