Time Agency

The Time Agency was a group apparently based in the 51st century and employing Human Time Agents. It was unknown how long it existed, but it was shut down sometime in the 51st century. The Agents utilized wrist straps which enabled them to travel through time to go on missions of an unspecified nature.

Jack Harkness was a member of the Time Agency from the Boeshane Peninsula, a matter of great pride to the other citizens of the Peninsula. (DW: Last of the Time Lords). As an Agent, he worked with John Hart, also known as "Captain John". (TW: Kiss Kiss, Bang Bang) After the Agency wiped two years of his memory for unknown reasons, he decided to leave the Agency and strike out on his own as a con man and freebooter. (DW: The Doctor Dances)

By the time Hart caught up with Jack again, Hart stated that the Agency had only seven Agents left and had subsequently been disbanded. (TW: Kiss Kiss, Bang Bang).

Other information

 * The 51st century war criminal Magnus Greel erroneously believed that after he had fled to Victorian London in his "time cabinet" a Time Agent (in the form of the Doctor) had pursued him. (DW: The Talons of Weng-Chiang)
 * The Family of Blood once stole a Time Agent vortex manipulator. (DW: Human Nature)
 * Jack stated that the Time Agency had a large war fleet. (NSA: The Stealers of Dreams)

Behind the Scenes

 * There is some speculation that River Song may be a Time Agent as she is from the 51st century and a time traveler. She was seen to be from the 51st century in both of her appearances so far, and in her next appearance, has an advanced technological gun and refers to Earth as if she is not from it' (by this time, humans have spread to different planets), further confirming that the 51st century is indeed her time period.