Greyhound One
From Tardis Wiki, the free Doctor Who reference
Greyhound One was a UNIT call sign which was used by Brigadier Alistair Gordon Lethbridge-Stewart, (TV: The Green Death, Invasion of the Dinosaurs, Battlefield).
It was also used by his daughter, Kate Stewart, once she was in charge. (AUDIO: Call to Arms et al)
During the Nestenes' attempted invasion of Earth during the 1990s, the call sign was used by Sergeant James Ramsay when requesting back-up. (HOMEVID: Auton)
