William Warner

Warner is an Air Force surgeon at the SGC.

Biography
Dr. Warner attempted to remove a Goa'uld that had infested Major Charles Kawalsky. The operation appeared to be successful but it turned out that the part that was removed was only a dead husk.

Several months later, after a foreign body was discovered attached to the heart of Cassandra, the sole survivor of Hanka, he performed exploratory surgery on her and was able to scrape some samples of the device for biopsy. He was unable to remove the device because it was booby-trapped by Nirrti to kill the girl if there was any tampering with it.

When the aliens that impersonated the Spirit guides of the inhabitants of PXY-887 infiltrated the SGC, he was one of the many personnel to disappear by their power. One of the aliens, Xe'ls, impersonated him until it was discovered by SG-1.

When Colonel Jack O'Neill and Dr. Janet Fraiser were infected with one of Ma'chello's anti-Goa'uld devices, he talked Major Samantha Carter through the steps involved in removing the a protein from her blood that was left over from the death of Jolinar.