At the Doctor's Mercy:
Upon discovering Jex's true identity the Doctor forces him out of the town's boundary and into the path of the Gunslinger. Can Amy make the Doctor see reason and let Jex back in before someone gets seriously hurt?
The Cowboy Doctor:
The Doctor is caught between a rock and a hard place in the wild west, with pistols aimed at him from one side and a cyborg coming towards him from another.