Mercy, Nevada
From Tardis Wiki, the free Doctor Who reference
Mercy was a town in the United States.
History
In 1870, the town was danger of starvation after Kahler-Jex arrived who was hunted by his cyborg, Kahler-Tek for his crimes as a war criminal. Around its border, a line of rocks was placed so that no one could escape or enter. (DW: A Town Called Mercy)