U.S. Cavalry
From Tardis Wiki, the free Doctor Who reference
The U.S. Cavalry was a branch of the United States military. While threatened by Daleks at Goodwood Motor Circuit, Sarah Jane Smith jokingly called for their help. (AUDIO: Glorious Goodwood)
Sarah later berated Sergeant Benton after he and his men chased off K1 while Sarah was trying to reason with it. Confused, Benton remarked that, "The US Cavalry never got treated like this." (TV: Robot)
