A deeply spiritual man, Halling is loyal to his people and loving to his son. He traveled with the rest of their people to Atlantis to establish a new life for themselves, relatively free from the constant threat of the Wraith. He briefly served as a guide to the Atlantis reconnaissance unit led by Sergeant Stackhouse, before he and the Athosians relocated to a newly-discovered continent near the island city. While they remain in communication with Teyla and Atlantis, there they hope to start a new life on the Atlantis planet.
Rising, Part 1 - Halling leads the Atlantis team to the Athosian village, and introduces them to Teyla Emmagan.
Rising, Part 2 - Halling travels through the Stargate to Atlantis with the rest of the Athosian refugees.
Hide and Seek - When his son Jinto goes missing, Halling must rely on his new friends from Earth to find him.
Thirty Eight Minutes - When Teyla and the team face immanent death, Halling insists that the Athosians be allowed to perform a death ritual with her. Weir refuses, not wanting to give up on their people.
Suspicion - Halling and the other Athosians are offended when Weir suspects a spy for the Wraith in their midst. When a continent is discovered near the city, he happily leads his people in relocating.
The Kindred, Part 2 - Teyla finds Halling and the other surviving Athosians imprisoned by Michael, as the Atlantis team helps to liberate them.