Plunkett was a member of the United States Air Force stationed at Stargate Command.



When a faction of Reetou Rebels invaded the SGC in 1999, he was assigned to a team consisting of Colonel Jack O'Neill and Dr. Daniel Jackson to hunt them down. After Chu, Plunkett became the second fatality as he was killed by one of the Reetou Rebels' Multiphasic blasters. (SG1: "Show and Tell")

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