Camulodunum was built into the corner of a junction between two Roman streets. The study concluded that Roman building ruins and old street remains were in some cases used as a template for later property divisions. The name of the town and the River Colne are also a legacy of the Romans. "Colchester" (first appearing in written form in the 10th Century as "Colencaester" and "Colneceastre") is a Saxon name derived from the Latin words "Colonia" and "Castra", with the River Colne also taking its name from "Colonia". Camulodunum Camulodunum (; ), the Ancient Roman name for what is now Colchester
A Town Called Mercy called the Gunslinger. However, the Gunslinger is a product of experiments by Jex to win a civil war on his planet, and the Doctor is unsure of what is the right thing to do. Showrunner Steven Moffat pitched the Wild West theme to Whithouse when thinking of ways to give each episode a distinct theme. Whithouse further developed the theme, including classic Western tropes and a sympathetic villain. "A Town Called Mercy" and the previous episode "Dinosaurs on a Spaceship" were the first to enter production for the seventh series. Much of the episode was filmed in March 2012 in