Harry, along with the other homeless people living alongside him, was impregnated with a Xenomorph embryo when the Predalien and several Facehuggers entered the sewers where the group lived. Harry was subdued by a Facehugger, and died when the Chestburster is implanted emerged from his body.
When Deputy Ray Adams tries to get them out of the sewer, one of them, Harry calls his dog Butch who then brings to them Buddy's rotting melted off arm. Joe, completely repulsed, leaves and they continue to live in the sewage. Later, they are attacked by facehuggers. One of which jumps out of the sewer water to attach itself to the homeless man who investigates what Butch was barking at. Moments later, a second facehugger appears and attempts to clamp onto Harry but is caught in time instead, however, an Alien Warrior appears which distracts Harry long enough for the facehugger to escape his grip and attach itself to his face.
The two incapacitated victims are soon discovered by a homeless woman being impregnated. An alien warrior appears and starts to approach her but the Predalien pushes it out of the way. The Predalien attacks the female which it is later revealed to have impregnated her. Though it is not shown, they are all killed birthing Chestbursters. At some point, the sewer becomes a small Hive. Wolf later finds the cocooned remains of the homeless people, and disintegrates their remains to cover up any evidence of the Xenomorph infestation. Ricky later sees a bloody chestburster with had recently hatched from one of the homeless people.