Dizi Adı: Doctor Who
Bölüm Adı: A Town Called Mercy
Sezon/Bölüm: 7. Sezon 3. Bölüm
Yayın Tarihi: 15 Eyl. 2012

The Doctor gets a Stetson (and a gun!), and finds himself the reluctant Sheriff of a Western town under siege by a relentless cyborg, who goes by the name of the Gunslinger. But who is he and what does he want? The answer seems to lie with the mysterious, Kahler-Jex, an alien doctor (yes another one!) whose initial appearance is hiding a dark secret.