The Journey of Emanon

Upon Emanonas galactic adventures, he realizes that by saving the lives of other species throughout the galaxy, he suddenly remembers that he had left Earth defenseless against future alien attacks. He is introduced to a female alien named Nova, who is also a Zartolian soldier assigned to assist him. He brings back his trusted robot, Thor. They enter into a black hole in space. It thrusts them into Earthas future, then into Earthas past. Emanon sees the horrible results. He goes back through the black hole several times, and each time he is on a different timeline when he approaches Earth. Earth had changed due to his mistake. Does mankind still exist? Has Earth been taken over by aliens? Will the planet be destroyed? What did Emanon, Nova, and Thor see in these different timelines? What did they see?