In 2372, Worf contacted him and asked him to come to Deep Space 9. Worf had decided to give his brother, Kurn, a new chance in life after having been cast out of the Empire due to Worf's opposition to the Klingon invasion of Cardassia. Noggra agreed to take on Kurn as a son.
After Kurn had his memory wiped, Noggra told him his name was Rodek and that he was Noggra's son. He promised to help him remember everything about his life, and they left for home. (DS9: "Sons of Mogh")