|Cause of Death||Hosts were killed|
The alien DNA had survived on the barren planet of Mars for an unknown period of time. It was drilled out with a rock sample machine from a Rover by Patrick Ross, and brought aboard the Excursion. There, the soil sample thawed and forced its way out of the sample container, where it then attacked the unsuspecting crew and merged with them. One member of the team, Dennis Gamble, had a genetic defect, and was not a suitable host for the alien DNA.