An astronaut gets infected with alien DNA during the first mission on Mars and runs amok on earth. Preston and Laura team up with a peaceful, genetically re-engineered Sil to track the monst... Read allAn astronaut gets infected with alien DNA during the first mission on Mars and runs amok on earth. Preston and Laura team up with a peaceful, genetically re-engineered Sil to track the monster down.An astronaut gets infected with alien DNA during the first mission on Mars and runs amok on earth. Preston and Laura team up with a peaceful, genetically re-engineered Sil to track the monster down.