Security guard (The Time of Angels)

The Security Guard was a member of Alistair's security staff on board the Byzantium Starliner. When River Song infiltrated the ship, she used her hallucinogenic lipstick to fool the guard into thinking he was in a forest. He was later found by Alistair who wiped lipstick from his face, revealing it to be the calling card of River Song. It was unknown if he was killed when the Byzantium crashed, though this is very likely. (DW: The Time of Angels)