The Space Guard travels back in time to prevent Earth from being destroyed. Krieas battle craft attack astronauts working on the space station before invading Earth. Senator Walker is stealing nuclear waste from the BARCEL laboratory and selling it on the black market. Air Force pilot Stark flies a Solar Dart, an American version of reverse engineered alien technology. He is sent to track down Space Guard Commander Leiter and his valiant crew. Nakita Barcel discovers she is pregnant and gives birth to their infant son Tommy Barcel. Krieas Major Hardride abducts the newborn child during an invasion. Earth scientist Hector Bensun is vaporized after being shot with a gamma ray. Nakita captures the mist in a vacuum beaker to save his life. Krieas and Terrons abduct human females and male babies for slaves and then burn the planet.