Vector tracker

The vector tracker was a component of the Doctor's TARDIS. (GAME: )

Behind the scenes
In Attack of the Graske, the vector tracker was operated by the player at home with either the digital remote control or a computer mouse which has been temporarily linked with the sonic screwdriver. If the player chose incorrectly, the Tenth Doctor, who was busy elsewhere in the TARDIS tracking a Graske, picks it out for them.