Guard (Children of Earth: Day Two)
From Tardis Wiki, the free Doctor Who reference
A guard watched over Ashton Down's security cameras. In 2009, Gwen Cooper and Rhys Williams infiltrated the base to free Jack Harkness. They started shutting off the security cameras. When the guard spotted Gwen using a device to shut them off, he sounded the alarm and reported them as intruders. (TV: Children of Earth: Day Two)
