For other uses of this name, see Harper (disambiguation)
S.G.C. officer who traveled to P3X-439 with SG units 1, 3, and 5 to attempt to recover one of the Ancients' repositories of knowledge. He defended the gate alongside Colonel Reynolds until the mission was completed, fighting off Al'kesh and death gliders sent by the Goa'uld Anubis.
Lost City, Part 1 - Harper travels to P3X-439 to back up SG-1 on a mission to retrieve an Ancient repository of knowledge.