One of Strelok's companions and one of the oldest legends of the zone. The player character can meet Doctor by completing main story mission up until the mission meet doctor is taken. Doctor or "Doc" was said to be one of the original stalkers to enter the zone of alienation, and was also said to have reached the center of the zone and get to the Wish Granter. His wish was to heal any living creature, even if it was beyond recovery and even dead, however he could no longer distinguish the difference between normal humans and mutants, for example if a Bloodsucker would harm a Stalker, Doc would heal a Stalker and vice versa. He is said to live in the most remote of marshes and probably only Strelok's group personally knew Doc. When Doc does travel, he is often accompanied by his pet Pseudodog which he tamed.