Hargreaves (Aquitaine)

Hargreaves was the robot which ran the HMS Aquitaine.

He had multiple humanoid bodies which each had different functions. His butler body was described as tall and wore a bowler hat, and his medic body had a screen on its chest. (AUDIO: Aquitaine)

The Doctor disconnected Hargreaves' head from his butler body and used it by patching it directly into the TARDIS to help save the crew-members of the HMS Aquitaine. This event is similar to how he would do the same thing with Handles. (TV: The Time of the Doctor)

Behind the scenes
Hargreaves is a nod to the original character of Hargreaves, the butler of Harrison Chase in the story TV: The Seeds of Doom. (AUDIO: Aquitaine)