Jack O'Neill blamed himself for what had happened to his son and came close to committing suicide. However, his adventure on Abydos with Dr. Daniel Jackson brought him out of his depression and caused him to lighten up a little. (Stargate) Nevertheless, Sara divorced her husband shortly after his return from the first Stargate mission. (SG1: "Children of the Gods") In 1999, when torturing O'Neill for information on Netu, Apophis used the memory of Charlie's death. (SG1: "The Devil You Know") It is possible that Charlie would have had the ATA-gene, like his father. (SGA: "Rising")