Tommy Levinson had been estranged from his father, Jason, for about six months before encountering the cult of Seth outside Seattle, which he joined under the brainwashing influence of nish'ta. When SG-1 intervened, Seth was killed, the cult members were released and freed of the effects of the drug, and Tommy reconciled with his father.
Portrayed by: Stuart O'Connell
Cross Reference: James Hamner, Jason Levinson, Nish'ta, Seth
Episode Reference: Seth