With the SGC under attack by Apophis, Maj. Kawalsky is forced to battle a larval Goa'uld for control of his mind. Daniel Jackson and Jack O'Neill attempt to communicate with the Goa'uld to no avail. It claims Kawalsky's body for its own. The major elects to undergo life-threatening surgery to remove the Goa'uld and appears to make a full recovery.
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