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 that would bring Kate, Petronella Osgood and the Twelfth Doctor into the chamber. They were later shot and killed by Kate. (TV: The Zygon Inversion)