Zygon guards (The Zygon Inversion)

Two Zygon guards escorted Kate Stewart, who they believed to be a Zygon, from Truth or Consequences to the Zygon pod chamber. They disguised as UNIT soldiers but, when they encounterd Petronella Osgood and the Twelfth Doctor, Kate turned on them and shot them. (TV: The Zygon Inversion)